At Kakyoku Academy, the Academy Detectives are selected from the best of the student discipline committee, and charged with keeping the school's order. Detective Sayama Tsubaki is paired with underclassman Sakurai - whose bloodhound-like nose for crime wounds the elite Tsubaki's pride. They've been ordered to pretend to be a couple, to catch the so-called "couple-crusher" red-handed. But if it's just an act, why is Tsubaki so flustered by Sakurai's lovey-dovey behavior…?