Boku no Nee-san

Little President's spin-off showcases Aihara Masane, a reformed delinquent, along with her step-sibling Jun and step-mother Chitose. The series derives most of its humor from Masane's and Jun's unrequited love for each other, and their awkwardness in conveying it to one another, all the while Chitose seems surprisingly accepting of their unusual situation.