Musume no Sex-chuu, Bed no Shita ni Kakureta Watashi wa...

I shouldn't be... Doing this...! The moans of the daughter echoes through the room... While her boyfriend relentlessly teases her... Seeing her daughter's situation, the mother becomes a woman again...!

(Source: Coolmic)

Note: Simultaneously released in long-strip and traditional formats, with 9 episodes and 3 chapters respectively.