妻、小学生になる。スピンオフ～初恋相手の君は誰?～
Manga Times (Weekly)
Murata, Yayuu
The story of the spin-off follows high-school student Takeru who, while in elementary school, became interested in his classmate Marika, the reincarnated wife of the series, who has matured recently. (Source: ANN)
