Akane Osaki, captivated since childhood by the magical performances of her father, Shinta Arakawa, witnesses a shocking incident during his decisive performance for promotion to shin'uchi (master rank). Six years later, now a high school student, she sets her sights on becoming a shin'uchi herself—pushing forward in the highly competitive world of rakugo.

Once feared as the ruler of all demons, Demon King Ahriman seeks to conquer the world…until he’s stopped by an unexpected force: his daughter, Dou! Too kind for chaos and too gentle for war, Dou melts the hearts of demons, humans, and even angels. Desperate to restore demon pride, Ahriman’s aide Jahi vows to train Dou to become a proper demon. But is Jahi any match for Dou’s compassion?!

The story is set in Hiroshima Prefecture's Onomichi City, where a high school student Nashiko Jippensha was kicked out of her house. Without a place to play with her friends, she learns that the mahjong parlor that her father used to run is now vacant. She fixes the mahjong parlor and turns it into a place where she and her friends can have fun, cook, have tea, and sometimes play mahjong.