Someone please help me! My stepson from the same school is having sex with me nonstop at home and at school. (Mari Takasugi, MIAE-308)

Mari Takasugi lives with her stepfather and stepbrother after her mother remarries; her stepbrother happens to attend the same school as her. The seemingly gentle stepbrother gradually reveals his true nature during their cohabitation. He masturbates in front of her while she sleeps, unable to suppress his lust, and raids her at night. He doesn't care that she's at school, relentlessly having sex with her 24/7! Her mind resists, but her body reaches climax!