After being made to come by a piston vibrator to the point of squirting a lot, "I'm already coming, ah!

The "No. 1 Boobs in SODstar History" piece is about making Momona Koibuchi cum thoroughly with a piston vibrator, but comments on the impression pointed out the lack of power in the piston, the presence of a male actor, and the actress' low sensitivity. It may not be enough for fans expecting more from the title.