Ichigo Aika: Strawberry Elegy

Kouta’s father remarries, and Kouta is introduced to his new stepsister, Aika, with both forming a terrible first impression. Now forced to live as a family, Kouta discovers that Aika secretly brings boys into her room for sexual encounters whenever their parents are away. When he confronts her about it, she threatens him to keep it from her mother. Kouta must deal with their volatile sibling relationship and the awkward secret hanging over their new household.