OYC-071 Two seemingly serious but actually shy glasses-wearing girls got carried away while drinking at home, and in their excitement, they started competing over who could do something amazing to their sleeping step-brother...

Normally, they are two serious glasses-wearing girls who only study. But in reality, they are incredibly perverted. These two let loose and got drunk at home, then started playing pranks on their sleeping younger brother by marriage! At first, it was cute pranks like poking his face and licking his ears, but it escalated to licking nipples, French kissing, and handjobs, with each trying to outdo the other. Even when their younger brother woke up, they continued the pranks! In the end, the two of them raped their confused younger brother together!