>>283175304
Anon, all those ideas of yours are probably the same as the authors when he made the prototype oneshot of this manga with the main duo being adults. Akita being a detective and Setsuna a serial killer, and their "marriage" to commit murder and shiet. Aside from high school students Setsuna being hot and Akita's reactions to it, things could've been better with the author explaining how to commit and getaway with murder instead of hastily and badly researched info on martial arts. Imagine a weekly serial killer manga. Setsuna being all flirty and wife-like while she forces him to commit murders with her. Akita's kouhai being suspicious of Setsuna and Akita while the unexplained murders increase (also being jealous at the same time).