Nee-chan is a Soap Girl!? 猫じゃらしポン吉

Yuuichi, who wanted to graduate from virginity at any cost by the age of twenty, made up his mind and went to a soapland. In that place, the woman that was called out and appeared surprised him. It was Yuuichi’s older sister, Yumi, who was appointed to him. Can Yuuichi really graduate safely from his virginity!?