Kosaka is a fashion design student and uses his classmate Nosaki Ritsu's (Grace Design Office Production Management), butt as a model for his underwear clothing line.
𝗢𝘁𝗵𝗲𝗿 𝗹𝗶𝗻𝗸𝘀:
](https://cdn.imgchest.com/files/my2pc9qzrw7.png)
