僕の彼女がマジメ過ぎるしょびっちな件

Second-year Haruka Shinozaki works up the nerve to confess to class representative Akiho Kosaka and is stunned when she says yes. Akiho brings the same rigid diligence to dating that she brings to everything else, researching the subject out of books and treating physical intimacy as a duty to be performed correctly. Between Haruka's flustered damage control, his clingy younger sister Kanata and a set of classmates with agendas of their own, nothing about the relationship goes to plan.