HNTRZ-010 Younger brother is cute Slender big breasts, lewd tattoos and shota-loving sex friend sisters Karen Otori Yuuki Hiiragi

Masao is a dull virgin who always studies. The older brother, who is a real-life brother, brings his unrestrained and erotic sex friends, Yuki and Karen, into their house, and they have been having a lot of fun, greedying them. Although he doesn't suit his brother, he's very interested in things that are naughty. The next morning, despite his older brother going out to work part-time, Karen, who is still left with alcohol, and Yuki, a little devilish, aims for Masao's innocent body.