Hentai shindorômu: Waisetsu hakuchûmu.

Chitose is about to get married and is supposed to be very happy, but she is plagued by lewd dreams every night and is not getting enough sleep. Of course her partner is not her fiancé Ryoji. Every night she is caressed by men she doesn't know, and when she wakes up, her crotch is soaking wet... Before she knew it, sleepiness began to attack her regardless of the time or place...