The joke isn't that she's innocent, it's that she's competent at everything except understanding why her boyfriend is horrified when she pragmatically suggests they have sex in increasingly public places. Every episode commits fully to the premise without breaking character or winking at the audience. If you hate sexual humor, this show will repel you instantly; if you're built for it, the consistency and timing make it funnier than comedies five times its budget.

Haruka never expected his confession to the perfect class representative to actually work. Akiho Kousaka is beautiful, athletic, and impossibly serious about everything she does. So when she agrees to date him, Haruka can hardly believe it. What he doesn't realize is that Akiho, who has never been in a relationship, takes romance as seriously as anything else. She approaches their relationship like any other challenge, with research, determination, and little sense of what a new couple normally does. Her well-intentioned attempts at intimacy are wildly miscalibrated, and her practical suggestions keep veering into sexual territory. Haruka keeps trying to convince her that none of this study is necessary, but she is set on making him happy in every way she can. The comedy comes from watching an ordinary guy date someone who treats physical affection like a homework assignment while truly caring about him.