GVH-628 My girlfriend's sister, Ayaka, who is a technical instructor for [ejaculation course fo

Her older sister Ayaka's job, which was kept a secret, was as a technical instructor for AV actresses and sex workers! And when I came to help with the job, I ended up filling in for the male model because he couldn't come! Covered by a sheet and with only my dick sticking out, I couldn't help but ejaculate wildly due to Ayaka-san's amazing techniques! Furthermore, the students play with their dicks after ejaculating and they faint in agony! Even though it was a lecture, I ended up failing to ejaculate prematurely. #Team Leader P