Tsuma, Shōgakusei ni Naru. #13

Tsuma, Shōgakusei ni Naru. (If My Wife Becomes an Elementary School Student) is a manga series written and illustrated by Yayū Murata. It began serialization in 2018 in the magazine Weekly Manga Times. The story follows a man who remains deeply depressed ten years after the death of his wife, only for a young elementary school girl to arrive at his door claiming to be his reincarnated spouse, exploring themes of grief, attachment, and the nature of love.

The series is noted for its high-concept premise, which blends elements of supernatural drama with domestic slice-of-life storytelling. Murata’s character designs are centered on emotional vulnerability, focusing on the protagonist's gradual healing. Upon its release, the series gained significant traction for its poignant handling of loss, eventually being adapted into a live-action television drama in Japan, which further elevated the profile of the volumes as they were collected and published by Houbunsha.