Do-S na Onii-chan to Tanoshii Koi no Hajimekata Oshite Kudasai!
ドSなお義兄ちゃんとの新しい恋のはじめ方教えてくださいっ!
Shiori's father remarries, bringing a new mother into her life. Along with her stepmother comes a new sibling—an older, attractive brother with a cruel personality.