Glory Hole Sex

This game features sexual scenes involving "glory hole" sex.

A "glory hole" is a hole in a wall, or other partitions, public lavatory stalls or adult video arcade booths, for people to engage in sexual activity or observe the person in the next cubicle while one or both parties masturbate. In addition to the penis, fingers, clitoris, breast, or the tongue may be inserted into the hole.

Do not confuse this with stuck-in-wall sex, where the person is usually stuck in a hole but the sexual act if performed freely from one or both side, or with wormhole sex where sexual act is performed through a portal.
(Side note: technically speaking a dimensional glory hole could exist, in that case both traits could apply! :P)

NSFW Glory Hole Sex
NSFW Glory Hole Blowjob