I'm Murata, a member of the university's ekiden team. I live in this dorm with about ten other teammates. It's not that we get along poorly, but honestly, I know I don't really fit in with them. To put it simply, they're all extroverts, and I'm an introvert.
Still, life in this dorm is enjoyable, and that's all thanks to our dorm mother, Minami-san. She's cheerful, friendly, and treats someone like me without any discrimination. She's beautiful, and her breasts are incredibly huge; to be honest, I've used her as my mental fodder for masturbation many times.
On the other hand, the extroverted guys tease her and treat her quite roughly. They'll casually grope her breasts just for fun. I'm so envious of those large, soft-looking breasts being kneaded by everyone, but I don't have the courage to do that on my own. The most I can manage is to join in when everyone surrounds her to grope her, and casually touch her breasts.
I'd blend in with all those messy hands, trembling, and savor the softness of those massive tits I've secretly admired for so long. Then, I'd masturbate alone, remembering the sensation left on my hand.
This is the story of the day I, through the leftovers of those extroverts, finally got to have leftover sex with my dream woman, Minami-san.