Tsuyoshi shikkari shinasai: Tsuyoshi no taimu mashîn de shikkari shinasai

This is a theatrical adaptation of the manga of the same name serialized in Morning magazine by Nagamatsu Kiyoshi. This home comedy depicts the protagonist Igawa Tsuyoshi's high school and college years. Igawa Tsuyoshi is a third-year junior high school boy who is bullied by his two older sisters and his mother and is forced to do all the housework. For some reason, his eldest sister Keiko is harsh to Tsuyoshi every New Year's Eve. In order to escape disaster in 1993, Tsuyoshi goes out to play with his best friend Watanabe Tsukasa. However, he accidentally gets into a time machine travels back in time from December 31, 1993 to December 31, 1981. There, he meets Tsuyoshi, a kindergartener, and Keiko, who is bullying him.