ROE-110 Boy's perverted best friend group

Seiji was born as the second son in a family of three brothers. From her mother Reika's perspective, she had the impression that she was an easy-going child, but... One spring, my older brother went to work and lived alone, while my younger brother went to boarding school . My father went away from home and his life changed in a hurry, Seiji and Reika started living with their mother and child. The lively house suddenly became quiet, and Reika felt lost... Seeing his mother like that, Seiji felt disappointed and empty, and he tried to regain her love, which he could not. monopolized until now.