妹が学校にいかなくなった日 ～○学生の危険日マ○コで校内レイプ生交尾～

Second part of a series.

Beautiful and curvy, Tomomi was in fact a shy junior student.
Then there was Mako, her precocious and popular younger sister.

A lecherous stalker watched her with covetous eyes.
His lust only grew since the gangbang that ruined her virginity.