The family of Ichika (Renka Iwamoto), a high school student who loves guessing, has had a strange rule since he can remember.That is, his mother Kazumi (Katama Moemi) decided that his father Reitaro could not go past the tapes posted everywhere in the house.

Ichika has not had any dialogue with her father since she can remember. Reitaro (Takezai Terunosuke) is forbidden by Kazumi to talk to mother and daughter, and is forced to live and eat alone at home in a dark and narrow room.Ichika has always felt strange about her family's situation.

One day when her 18th birthday was approaching, Ichika wanted to solve the mystery of her family, so she went to Reitaro to ask. Reitaro told Ichika that the reason why Ichika was taped was because Reitaro's words hurt her.And beauty.

Prince Taro wanted to talk to Kazumi in order to change the family situation, but because he crossed the tape, Kazumi took crazy actions.Unable to think about it, Reitaro confessed his family's situation to Sayoko Kurashiki (Ayame Mizusaki) who had saved him, and was gently comforted by saying "This is complete domestic violence".

Ichika hopes to save the relationship with Mei and Reitaro and restore the family.The mystery of the tape is constantly approaching, and there are "lies" that parents cannot tell.