Kyoko is a widow who runs a bar by herself after her husband passed away, and cannot forget the pleasure she felt when she took her stepbrother Kazuto's virginity before leaving her husband's house. Wakana is a teacher at Kazuto's high school who had feelings for him as a student, and when he graduated the two fell in love and ran away together despite his objections. The strange life of the three people living together, tangled up in a tangle, begins.