「勉強を教えてくれたら、代わりにエッチなこと教えてあげる」ヤリマンすぎて成績が壊滅的な義妹と、勉強命で童貞のボクとの交換条件付き個人授業。
(You Helped Me Study, So I'll Teach You Naughty Things) A Private Lesson With Strings Attached Between My Step-Sister, A Whore Whose Grades Are Dropping Like A Rock, And Me, A Virgin And A Nerd
