男はとっくに事後の一服モードに入ってるのにアクメが全然止まらなくて中空に向かってイモムシみたいに腰をヘコつかせてるあさり先生の絵です。

They already finished long ago and the guy is already in "smoke break" mode, but Asari-sensei's orgasms haven't stopped and her hips are buckling and spasming like a wriggling caterpillar.