魔入りました！入間くん | Welcome to Demon School! Iruma-kun | 마에 들어갔습니다! 이루마 군 | 入间同学入魔了 | Iruma à l'école des démons | Selamat datang di sekolah iblis! Iruma-kun | इरुमालाई डिमन स्कूलमा स्वागत छ! | Iruma w szkole demonów | Приди же в Мир Демонов, Ирума-кун! | Iruma-kun en el instituto demoníaco | อิรุมะคุงกับโรงเรียนปิศาจ | İşte Şeytan Geliyor! Iruma-kun | Şeytan Okuluna Hoş Geldin, Iruma-kun | Vào Ma Giới Rồi Đấy! Iruma-kun | Iruma Giá Đáo

Welcome to Demon School! Iruma-kun (Japanese: 魔入りました! 入間くん, Hepburn: Mairimashita! Iruma-kun; "Enrolled Demon Iruma!"), also known as MaIruma (魔入間) or Iruma-kun (入間くん) for short, is a Japanese manga series by Osamu Nishi about a teenager who is sold by his parents to a demon who adopts him as his grandson and enrols him in a school for demons. It has been serialised in Akita Shoten's shōnen manga magazine Weekly Shōnen Champion since March 2017, with its chapters collected in 48 tankōbon volumes as of April 2026.

Ultimate pushover Iruma Suzuki is in the worst predicament of his life—his deadbeat parents just sold his soul to a demon! Now, he's forced to live in the Netherworld and attend a high school packed with fiends. Thanks to the extreme evasion skills he developed living with his terrible parents, plus the backing of his surprisingly doting new demon grandfather, Iruma might just survive this literal hellscape. All he has to do is win over aggressive classmates, summon demonic familiars, and keep his human identity an absolute secret... Piece of cake, right?