新・他の男の精液で孕んでもいいですか…？３ 浮気手記に綴られた快楽の爪痕

The protagonist, Masato, and his girlfriend, Sayaka, were a couple with about a year of dating history. They’d met during a regional joint theater performance and had been inseparable ever since.
Though they attended different schools, they spent almost every day together at home, deepening their bond.

In the fall of their third year, Masato and Sayaka participated in their final joint theater performance as students. But behind the scenes of rehearsals, Masato remained oblivious to the fact that Sayaka’s body was being claimed by pleasure elsewhere.