『Toshiro's Girlfriend Yui』 is a work that depicts a certain event within a family. The older brother Hikaru notices Yui's masochistic personality and attempts to train her. While treating Yui gently, Hikaru also has scenes where he stares at her. There is an episode where Hikaru offers Yui tea when she comes to retrieve a forgotten item in Toshiro's absence, but accidentally spills it on his crotch. This work focuses on family relationships and human fetishes, providing readers with new perspectives. I personally felt the charm of the work while reading it and was able to follow the story with great interest.