Top 12 Summer 2021 Must Watch Anime

We hate recommendations and reviews that start off with unnecessary prose, so let’s skip all that and get to the meat of things! 12 New Summer 2021 Anime You Should Be Watching Right Now.

Here you go:

12. Re-Main

  • English: RE-MAIN
  • Release Date: Jul 4, 2021
  • Studio: MAPPA
  • Genre: Sports

Coming in at number 12, we have Re Main, an original water polo sports anime by MAPPA, written by Masafumi Nishida, who is also serving as the chief director and sound director of the series. In 2020 we had The Gymnastics Samurai, an original sports anime television series about gymnastics by MAPPA which was great. It also a got a position in our Top 10 Fall 2020 Must Watch Anime list as well. So hopefully RE-MAIN will not disappoint.

Story: The anime’s story centers on Minato, a boy who stopped playing water polo due to a certain incident in the winter of his third middle school year. He picks the sport back up again with a new team when he starts in high school, but the fledgling team runs into many problems (Source: Anime News Network).

11. Sonny Boy

  • English: Sonny Boy
  • Release Date: July 16, 2021
  • Studio: Madhouse
  • Genre: Science fiction, Survival

Madhouse is back! Hisashi Eguchi (Stop!! Hibari-Kun!) providing the designs, Shingo Natsume (One-Punch Man, Space Dandy, Boogiepop wa Warawanai) penning the scripts as well as directing the series.What else do you need?! Get ready for Sonny Boy.

Story: Sonny Boy is a Sci-Fi survival series with a stacked 36-student cast of characters. Uprooted from their middle school lives, these students end up in another dimension and have to fight to survive. (Source: Funimation)

10. Hyaku-Man no Inochi no Ue ni Ore wa Tatteiru S2

  • English: I’m Standing on a Million Lives S2
  • Release Date: Jul 10, 2021
  • Studio: Maho Film
  • Genre: Action, Game, Drama, Fantasy, Shounen

Compared to the boring start of season 1, season 2 will get better with future arcs and will slowly get you invested in the story. It’s by the same author of the excellent thriller manga My Home Hero. It’s an amazing manga. If you got time, I’ll say check it out.

Story: Aloof and logical middle school third-year Yuusuke Yotsuya is transported to a game-like alternate world. He becomes a third player and takes on a dangerous quest with his classmates Iu Shindo and Kusue Hakozaki, who were transported there earlier. The cold Yuusuke eschews emotionalism and examines all elements with detachment, sometimes even toying with the lives of his companions. Can he protect his party from attacking monsters, difficult incidents, and powerful scheming enemies and win the game ? (Source: Crunchyroll)

9. Pīchi Bōi Ribāsaido

  • English: Peach Boy Riverside
  • Release Date: July 1, 2021
  • Studio: Asahi Production
  • Genre: Fantasy

Illustrated by Cool-kyou Shinja and serialized in Kodansha’s Shonen Magazine R since August 2015, Peach Boy Riverside is a crazy over-the-top yet enjoyable show for you to chill around this summer.

Story: Saltherine Aldarake, princess of the Kingdom of Aldarake, dreams of traveling the world—a dangerous dream in a land where monsters roam the countryside as they please, and humans live behind high, strong walls. But when a chance meeting with traveler Mikoto gives hope to her dream, he shatters it soon after, as he reveals himself to be none other than Momotaro, ruthless demon-slayer. Though horrified by the gore Momotaro leaves behind, Saltherine is convinced more than ever that she needs to learn about the world beyond her walls, and journeys out…following the steps of the mysterious, charismatic, terrifying boy she met that day… (Source: Kodansha USA)

8. Heion Sedai no Idaten-tachi

  • English: Deities in the Peaceful Generation
  • Release Date: July 23, 2021
  • Studio: MAPPA
  • Genre: Dark fantasy

A season without MAPPA is almost unheard of nowadays. Attack on Titan: The Final Season in winter, Zombie Land Saga Revenge in spring, and finally here we are with Heion Sedai no Idaten-tachi this summer.

Written by Amahara (Ishuzoku Reviewers) and illustrated by Cool-kyou Shinja (Miss Kobayashi’s Dragon Maid, I Can’t Understand What My Husband Is Saying, Komori-san Can’t Decline) it’s a dark fantasy seinen that has been serialized in Hakusensha’s seinen manga magazine Young Animal since August 2018. Although teaser visual shows ecchi but it’s more of an action, demon kind of thing.

Story: Gods appeared when humanity was on the verge of destruction due to the work of demons. Deities called “Idaten” fought and sealed away the demons 800 years ago. Nowadays, the Idaten have no fighting experience and they live peaceful lives. But now the demons are reviving, and the battle between gods, humans, and demons is about to begin. (Source: Anime News Network)


  • English: SCARLET NEXUS
  • Release Date: Jun 18, 2021
  • Studio: Sunrise
  • Genre: Action,Fantasy

Personally, I’m not a big fan of anime adaptations of video games (I don’t mean VNs (Visual Novels) ). Every time we get a video game adaptation in anime it turns out to be bad one way or another, but hopefully this time the PV looks amazing and we got rock band THE ORAL CIGARETTES doing the opening theme song “Red Criminal”. Let’s see how it goes.

Oh, one more thing, the Scarlet Nexus game has not been launched yet, it will launch on June 25 on PlayStation 5, PlayStation 4, Xbox Series X|S, Xbox One, and PC via Steam. So if you are a gamer. Check it out.

Story: Solar calendar year 2020: grotesque organisms called Others have begun eating people. To take down this new enemy, the Other Suppression Force is formed. Saved by this elite team as a child, psychokinetic Yuito withstands the training to enlist. On the other hand, prodigy Kasane was scouted for her abilities. But Kasane’s dreams tell her strange things, dragging the two into an unavoidable fate. (Source: Funimation)

6. Genjitsushugi Yuusha no Ookoku Saikenki

  • English: How a Realist Hero Rebuilt the Kingdom
  • Release Date: July 4, 2021
  • Studio: J.C.Staff
  • Genre: Action, Military, Harem, Magic, Romance, Fantasy

Written by Dojyomaru and illustrated by Fuyuyuki, How a Realist Hero Rebuilt the Kingdom may seem like another same old story with the usual isekai concept on the surface that you may want to drop, but I’ll say give it a chance. Combining both a practitioner and learner-centered approach towards leadership, our main character with the story mainly focuses on concepts like strategy, competitors, military, and their reference from the view of perspective of a practitioner to rebuild the struggling kingdom with the administrative reform!

And obviously, it is from Shōsetsuka ni Narō, so you get some romance and sprinkling of harem comedy to it.

Story: “O, Hero!” With that cliched line, Kazuya Souma found himself summoned to another world and his adventure–did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation! What’s more, he’s betrothed to the king’s daughter now…?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side. Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess…?! What path will his outlook as a realist take Souma and the people of his country down? A revolutionary transferred-to-another-world administrative fantasy series starts here!

(Source: J-Novel Club)

5. Tantei wa Mou, Shindeiru

  • English: The Detective Is Already Dead
  • Release Date: July 4, 2021
  • Studio: ENGI
  • Genre: Fantasy,Mystery

Another project with Deko Akao handling the script this season. The Detective Is Already Dead by Nigojū is on number 5. New studio, new season but Manabu Kurihara is serving as the director (Hellsing Ultimate, Tokyo Ghoul: “Pinto”, Bleach) and Yōsuke Itō is designing the characters. The light novel series won the 15th MF Bunko J Light Novel Newcomer Award – Grand Prize in 2019.

Story: Kimizuka Kimihiko was the assistant to a beautiful detective named Siesta — until Siesta died, anyway. Now, Kimitsuka has encountered a girl who bears an uncanny resemblance to his former boss… (Source: Yen Press)

4. Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta… X

  • English: My Next Life as a Villainess: All Routes Lead to Doom! X
  • Release Date: Jul 3, 2021
  • Studio: Silver Link
  • Genre: Harem, Comedy, Drama, Romance, Fantasy, School, Shoujo

Next, we have HameFura by Satoru Yamaguchi, the series that brought mainstream attention to the isekai villainess genre on number 4. With great character fleshing out and good plot development, the first season gave a breath of fresh air in isekai. So look forward to it .Season 2 will be amazing.

Story: Wealthy heiress Catarina Claes is hit in the head with a rock and recovers the memories of her past life. It turns out the world she lives in is the world of the game Fortune Lover, an otome game she was obsessed with in her past life… but she’s been cast as the villain character who tries to foil the protagonist’s romances! The best ending the game has for Catarina is exile, and the worst, death! She’ll have to find a way to avoid triggering the flags of doom, and make her own happy future! The misunderstanding-based screwball love comedy now begins! (Source: Crunchyroll)

3. Vanitasu no Karute

  • English: The Case Study of Vanitas
  • Release Date: July 3, 2021
  • Studio: Bones
  • Genre: Dark fantasy,Steampunk,Supernatural

At number 3 we have the supernatural dark fantasy Vanitas by studio Bones, written and illustrated by Jun Mochizuki, the creator of Pandora Hearts.

The reason it is this high on the list solely because of the production committee. I’m really curious because it’s not just about studio Bones, we have Deko Akao (Noragami, Frame Arms Girl, After the Rain, Higehiro) overseeing the scripts, Yuki Kajiura (Puella Magi Madoka Magica, Demon Slayer: Kimetsu no Yaiba, Fate/Zero, Mobile Suit Gundam SEED) is composing the series’ music and finally Tomoyuki Itamura on the director seat. This will be his first time as a director on Bones but previously he worked as a director and storyboard artist alongside Akiyuki Shinbo for 10 years in Shaft. He also even worked with Masaaki Yuasa and Shinichirō Watanabe in Super Shiro and Carole & Tuesday. So let’s see how it goes.

Story: Rumors revolving around The Book of Vanitas, a clockwork grimoire of dubious reputation, draw Noé, a young vampire in search of a friend’s salvation, to Paris. What awaits him in the City of Flowers, however, is not long hours treading the pavement or rifling through dusty bookshops in search of the tome. Instead, his quarry comes to him…in the arms of a man claiming to be a vampire doctor! Thrust into a conflict that threatens the peace between humans and vampires, will Noé cast in his lot with the curious and slightly unbalanced Vanitas and his quest to save vampirekind ? (Source: Yen Press)

2. Kobayashi-san Chi no Maid Dragon S

  • English: Miss Kobayashi’s Dragon Maid 2nd Season
  • Release Date: Jul 8, 2021
  • Studio: Kyoto Animation
  • Genre: Slice of Life, Comedy, Fantasy

It just feels good to have Kyoto Animation back on the television anime after all these years. Kyoto Animation we missed you!!
Anyway about Kobayashi, our messed-up dragon maid is back! Finally, we are getting season 2. Cast from the season is also here.
The returning cast includes:

Story: Kobayashi is your average office worker who lives a boring life, alone in her small apartment, until she saves the life of a female dragon in distress. The dragon, named Tooru, has the ability to magically transform into an adorable human girl, albeit with horns and a long tail, and she will do anything to pay off her debt of gratitude, whether Kobayashi likes it or not. With a very persistent and amorous dragon as a roommate, nothing comes easy, and Kobayashi’s normal life is about to go off the deep end. (Source: Crunchyroll)

1. Tensei shitara Slime Datta Ken 2nd Season Part 2

  • English: That Time I Got Reincarnated as a Slime Season 2 Part 2
  • Release Date: Jul 6, 2021
  • Studio: 8bit
  • Genres: Action, Adventure, Comedy, Demons, Magic, Fantasy

Maybe we don’t need any introduction. Seasonal watchers already know about the news, but for the sake of the list, I’ll repeat it again. Tensura 2 is here. Season 1 was a bit slimy, season 2 part 1 had some twists and turns but season 2 part 2 ..uhmm the storm is coming. Stay tuned. Jul 6, Tuesday at 23:00 JST (Japanese Standard Time).

Story: Lonely thirty-seven-year-old Satoru Mikami is stuck in a dead-end job, unhappy with his mundane life, but after dying at the hands of a robber, he awakens to a fresh start in a fantasy realm…as a slime monster! As he acclimates to his goopy new existence, his exploits with the other monsters set off a chain of events that will change his new world forever! (Source: Yen Press)

So there you go our top 12 anime of summer 2021. What do you think ? Which one of these are you hyped about the most. Leave a comment below.

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