Gibomai  

Įseserė, Sacrifice of the Mother and the Little Sister, Step Sister, 의붓 여동생, 犠母妹

A well-known painter passed away from heart disease while being married to Megumi, a woman significantly younger than him. His son, Kyosuke, disapproved of the union and desired Megumi's removal from their home. In response, Megumi suggested that Kyosuke could have complete freedom over her daughter Yuna, his stepsister, if they were allowed to remain in the household. As expected, Kyosuke agreed to this arrangement.