In the stories Don't Stay Gold and Tadayoedo Shizumazu, Saredo Naki mo Sezu, as well as its sequel Saezuru Tori wa Habatakanai, Yashiro is a sadomasochist who desires to be viewed in an obscene manner. Despite appearing cheerful on the outside, he is a broken man with a history of abuse and has no interest in repairing his emotional detachment from others. After completing high school, Yashiro takes over as leader of Shinseikai, a yakuza group affiliated with Doushinkai. Although attracted to his new attendant and bodyguard Doumeki, Yashiro pushes away those he cares about due to past unrequited love experiences.
In Tadayoedo Shizumazu, Saredo Naki mo Sezu, Yashiro shares his past and becomes close with fellow classmate Kageyama. He ends up harboring unrequited feelings for him.