Forty-year-old detective Eiji Kirisame has found maybe the strangest witness of his life: a silent high school girl named Tsugumi Kuchinashi who was at the scene of the crime. Her statements mostly consist of shoddy doodles on a drawing pad, but Eiji is no stranger to piecing together the truth from limited evidence―and besides, it seems like Tsugumi might have a knack for deduction! So he'll take every page seriously if it might help solve the case. But, uh, does that last page really say…“Marry me?”?!

A Pen, Handcuffs, and a Common-Law Marriage has a story by Shinichi Sawaragi and art by Tank Gasuyama. English translation is done by Ko Ransom and lettering by Ivo Marques. Published by Yen Press (March 24, 2026). Rated T.

Erica Friedman
Rating:

I wanted to like this, I really did. I like clever howdunnits and was willing to deal with very, very many handwaves of the premise to get to that. But in the end, A Pen, Handcuffs, and a Common-Law Marriage had a fatal flaw that made it more irritating than entertaining.

But first, let's look at the overall story. A mute teenager blackmails a detective into marrying her and helps him solve clever crimes. It really could have been good, even with the age-gap thing, which is supposed to be funny and potentially romantic and is mostly just eww. Thankfully, Kirisame agrees, and so do most of the people around him, so at least here, we don't have any “funny” nudity. The crimes are interesting, the solutions are also interesting. And really, if this were the story, I would have probably enjoyed it.

But… for all of this to work, Kirisame has to be an idiot. This is simply unforgivable in a detective story. As a basic principle, I think all detectives should be smarter than the reader, or why are we even bothering? The detective has to at least be able to understand what the reader understands, but Kirisame is easily three steps behind the reader and a whole block behind Kuchinashi (a name so on point that it hurts.) For there to be that gap in comprehension, Kuchinashi needs to give parts of information, but leave out other parts, so there is room for the reader to guess what she means before Kirisame does. I found this teeth-grittingly irritating, waiting for the detective to catch up with the teenager and me.