is a Japanese manga series written by Shinichi Sawaragi and illustrated by Tank Gasuyama. It began serialization in Hakusensha's manga magazine Young Animal in December 2022. An anime television series adaptation produced by EMT Squared is set to premiere in January 2027.
Plot Eiji Kirisame, a forty-year-old detective, solves crime with the help of a witness named Tsugumi Kuchinashi, a teenage girl who communicates through writing and drawings. However, Tsugumi is romantically interested in Eiji and wants to marry him.
Characters
Media Manga Written by Shinichi Sawaragi and illustrated by Tank Gasuyama, A Pen, Handcuffs, and a Common-Law Marriage began serialization in Hakusensha's manga magazine Young Animal on December 23, 2022. Its chapters have been compiled into seven volumes as of April 2026.
During their panel at Anime NYC 2025, Yen Press announced that they had licensed the series for English publication.
Anime An anime television series adaptation was announced on April 17, 2026. It will be produced by EMT Squared and directed by , with series composition handled by , characters designed by Miyuki Nakamura, and music composed by . The series is set to premiere in January 2027.
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