A Pen, Handcuffs, and a Common-Law Marriage

Synopsis

Forty-year-old detective Eiji Kirisame has encountered perhaps the most peculiar witness of his career: a mute high school girl named Tsugumi Kuchinashi who was present at the crime scene. Her testimony primarily consists of crude sketches in a drawing pad, but Eiji is well-accustomed to uncovering the truth from sparse clues. He intends to treat every page with seriousness if it could assist in cracking the case. However, what is the meaning of the final page reading... "Will you marry me?!"