MANE-009 [Uncensored Leaked] M-man play: Yuri Sasahara's private ejaculation lesson - female teacher edition

My homeroom teacher went on maternity leave, and my assistant teacher, Yuri Sasahara, who I'd had a crush on for a while, became my new homeroom teacher. "I" was so preoccupied with her that I couldn't concentrate on my studies, and my grades plummeted. Worried about this, Yuri offered to give me extra lessons in her room, but when we were alone, I couldn't help but get hard, and Yuri...