プロンプト

Anal sex in the *ekiben* standing face-to-face position: the man on the left has his penis thrust deep into the man on the right's anus: the man on the left moves his hips rapidly up and down while the man on the right moans intensely from the pleasure: seven seconds in, the man on the right ejaculates heavily: simultaneously, the man on the left ejaculates inside the other's anus: semen spills out from the anus.