HNTRZ-010 "Little bro, you're so cute" Slim big boobs and perverted tattoos and loli-loving sister friends Hou Karen Hiiragi Yuki

Masao, an uncool virgin who's always studying. His brother, a player, brings his wild and horny girlfriends Yuki and Karen home to indulge in pleasure repeatedly. Though he doesn't get along with his brother, Masao is very interested in H things. The next morning, while his brother is out at work, the seductive Karen and the mischievous Yuki, still tipsy from the night before, start closing in on Masao's innocent body...