Based on manga series "Tsuma, Shougakusei ni Naru" by Yayuu Murata (first published August 10, 2018 in manga magazine Weekly Manga Times).
"If My Wife Becomes An Elementary School Student" takes over TBS' Friday 22:00 time slot previously occupied by Dearest (2021) and followed by Invisible (2022) on April 15, 2022.