This game features sexual scenes where a character performs a "blowjob duck face" expression during a blowjob.

The blowjob duck face is a facial expression that can be achieved during a blowjob doing vacuum mouth and visibly stretching the lips forward. In some variation the blowjob duck face can be achieved while doing a blowjob with the tongue out.

NSFW Example Frontal View 1
NSFW Example Frontal View 2
NSFW Example Side View
NSFW Example Side View With Tongue Out