ROE-110 The perverted friends group of my son

Seiji was born as the second son in a family with three siblings. From his mother's perspective, Reika, she had the impression that he was an easy-going child, but... One spring, my older brother went to work and lived alone, while my younger brother entered boarding school. My father went away from home and his life changed rapidly. Seiji and Reika began living with their mother and her children. The lively home suddenly became quiet, and Reika felt a sense of loss... Seeing his mother like that, Seiji felt frustrated and empty; he tried to regain his mother's affection, something he had not been able to monopolize until now.