The story revolves around Ritsuka Tachibana, a female second-year high school student who attends Shiko Academy in Shiko Town. She enjoyed her school life while living with her mother Maria, but one day, that balance fell into ruin. The anime is a story of Rikka being loved and being attracted to demons.

Tachibana Ritsuka is a female second-year student attending Shiko Academy. Though she longs to be in love, she passes the days living a quiet, uneventful life. One day, the student council president, Kaginuki Rem whom all the academy students admire, sends for Ritsuka which leads to her peculiar encounters with everyone in the student council. However, they are not what they seem.