This is the R18 version which includes adult sex scenes!

The big girl era has finally arrived!! Thanks to his sister's scheming ways, Souta was roped into becoming the hall director for the girl's varsity volleyball team. Being so short, he's the perfect target for their merciless teasing. Can the diminutive Souta stand up to these amazons and conquer the high hurdles of life in an all-girls dorm? For Souta and his harem of big girls, it's victory or bust!