Her older sister, Ayaka, whose profession was shrouded in secrecy, turned out to be a technical instructor for AV actresses and sex workers! I came to help her out, but when the male model suddenly couldn't make it, I ended up taking his place! Covered by a sheet, with only my cock exposed, I couldn't help but have multiple explosive orgasms under Ayaka's expert techniques! To top it off, I was also tormented by her students after ejaculating, making me moan in pleasure! It was supposed to be a lesson, but I kept failing at the "How To" and ended up having premature ejaculations again and again... #ClassPresidentP