CHRV-056 The perverted brother is a boob star person, and moreover, I am a big-titted girl. The plan to turn my little sister into a masochistic big-titted girl is worth seeing!

My older brother, his age equals the length of time he's been single and is of course a virgin. Even I, his sister, think he's quite creepy. At this rate, he won't get a girlfriend, let alone male friends... Moreover, my perverted brother is an 'obsession with breasts' type, while I have huge breasts. When we're at home, he immediately comes near me and flaunts his obsession! Helplessly getting assaulted by him... Why does this happen? Because I have huge breasts? What's this 'plan to turn into a masochist'?