IPX-948 Collaboration work with the older sister from the used bookstore and Azusa Hikari's debut manga original

My work wasn't going well, so I recently returned to my hometown and started helping out at my grandfather's used bookstore. The countryside is boring, and I've just been wasting time. Recently, I found something enjoyable: playing dirty tricks on Mugikun, who often comes to this rundown bookstore. Just a little stimulation would make him get an erection and ejaculate; there's a strange relationship between us. Actually, saying that I'm helping Mugikun with his sexual needs is just an excuse—I just want to feel good myself.