Mairimashita! Iruma-kun

'Welcome to Demon School! Iruma-kun' (魔入りました! 入間くん, Mairimashita! Iruma-kun, "Enrolled Demon Iruma!") is a Japanese manga series by Osamu Nishi. It has been serialized in Akita Shoten's shōnen manga magazine Weekly Shōnen Champion since March 2017. As of June 2023, the series has been collected in thirty-two tankōbon volumes.

An anime television series adaptation produced by Bandai Namco Pictures, aired on NHK Educational TV between October 2019 and March 2020, followed by a second season from April 2021 to September 2021, and a third season from October 2022 to March 2023. By September 2020, the manga had over 5 million copies in circulation.

Synopsis
Fourteen-year-old Iruma Suzuki has been unfortunate all his life, having to work to earn money for his irresponsible parents despite being underage. One day, he finds out that his parents sold him to the demon Sullivan. However, Iruma's worries about what will become of him are soon relieved, for Sullivan merely wants a grandchild, pampering him and making him attend the demon school Babyls.

At first, Iruma tries to keep a low profile in fear of his peers discovering that he is human. Unfortunately, this ends up being more difficult than he expected. It turns out that Sullivan himself is the chairman of the school, and everyone expects him to become the next Demon King!

Iruma immediately finds himself in an outrageous situation when he has to chant a forbidden spell in front of the entire school. With this, Iruma instantly earns a reputation he does not want. Even so, he is bound to be roped into more bizarre circumstances.

Manga
The series has been serialized in Akita Shoten's shōnen manga magazine Weekly Shōnen Champion since March 2, 2017. Akita Shoten has collected its chapters into individual tankōbon volumes. The first volume was released on July 7, 2017. As of June 8, 2023, thirty-two volumes have been released.

At Anime Expo 2022, Kodansha USA announced that they licensed the series for English publication.

Spin-off
A spin-off, titled Makai no Shuyaku wa Wareware da! (魔界の主役は我々だ！, "We Are the Main Characters of the Demon World!"), started serialization in Weekly Shōnen Champion on January 9, 2020. The first tankōbon volume was released on June 8, 2020. As of June 8, 2023, fourteen volumes have been released.

TV Anime
An anime television series adaptation was announced in 10th issue of Weekly Shōnen Champion alongside Beastars on February 7, 2019. The 23-episode series is animated by Bandai Namco Pictures and directed by Makoto Moriwaki, with Kazuyuki Fudeyasu handling series composition, and Akimitsu Honma composing the music. NHK and NHK Enterprises are credited for production. The series aired from October 5, 2019, to March 7, 2020, on NHK Educational TV. Da Pump performed the series' opening theme song "Magical Babyrinth," while Yū Serizawa performed the series' ending theme song "Debikyū" (デビきゅー). Crunchyroll and Muse Communication are streaming the series in their selected regions.

Season 1

 * Staff

A second season was announced and aired for 21 episodes from April 17, 2021, to September 11, 2021. The staff returned to reprise their roles. Da Pump performed the second season's opening theme song "No! No! Satisfaction!", while Amatsuki performed the second season's ending theme song "Kokoro Show Time" (ココロショータイム, Kokoro Shō Taimu).

On May 18, 2021, it was announced that Sentai Filmworks picked up the home video rights.

Season 2

 * Staff

On September 11, 2021, the Twitter account for the anime announced that a third season is in development. It aired from October 8, 2022 to March 4, 2023. Fantastics from Exile Tribe performed the opening theme song "Girigiri Ride it Out" (ギリギリ Ride it out, On the Edge Ride it Out), while Wednesday Campanella performed the ending theme song "Nabe Bugyо̄" (鍋奉行, Hotpot Boss).

Season 3

 * Staff

Reception
The manga was compare between Rosario + Vampire, cross it with Hayate the Combat Butler, and Kemono Michi: Rise by Anime News Network in 2019.

By January 2020, the first fifteen volumes of the manga had over 2.5 million copies in circulation. By September 2020, the manga had over 5 million copies in circulation.

Trivia
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