A Pen, Handcuffs, and a Common-Law Marriage TP (2026)

The great detective has met his match! Middle-aged detective Eiji Kirisame has finally given in to the strange high-schooler Tsugumi’s marriage proposal, and now they’ve started living together! As her new fiancé, Eiji’s saddled with the responsibility of having to join Tsugumi in a visit to her parents’ house... but surely nothing could go all that wrong in just one night, could it? To make matters worse, Eiji may finally have found a truly unsolvable case...

Middle-aged police detective Eiji Kirisame brilliant deductions have unraveled case after case, but now he’s totally stumped: How can he possibly convince the infatuated highschooler Tsugumi Kuchinashi to give up on marrying him!? Especially when she’s helped solve three cases already, and is blackmailing him into letting her move in with him! When Kirisame’s next case takes him to her school, he finds more than he bargained for—in more ways than one...