Happy Sugar Life (Japanese: ハッピーシュガーライフ Hepburn: Happī Shugā Raifu) is a Japanese psychological thriller manga series written and illustrated by Tomiyaki Kagisora (鍵空とみやき). It has been serialized in Square Enix's shōnen manga magazine Gangan Joker since May 2015. The series is licensed by Yen Press. An anime television series adaptation by Ezo'la aired during the Animeism programming block between July and September 2018.
The series is centered on high school girl Satō Matsuzaka who befriends a mysterious little girl named Shio, and immediately falls in love with her. She kidnaps Shio and keeps her in her apartment. She vows to protect that feeling of love, even if it means committing crimes or even killing people.