The twisted imagination of erotic mastermind Sei Shoujo brings you a sensual midsummer night's dream... or perhaps a tantalizing nightmare.

Follow college student, Takamiya Ryouhei, to the luxurious Black Rose Manor where he's due to spend a week tutoring Maria, the stunning daughter of the estate's equally gorgeous mistress, Marie, and attended to by the estate's alluring maid, Aria. But how much tutoring can he hope to accomplish surrounded by the temptation of three beautiful yet terribly lonely women?

As Ryouhei descends into abject debauchery as their new plaything, is the future that awaits him a rosy one? Or is it more of a nightmare...?

Sei Shoujo, the creator of titles as influential as they are infamous such as Bible Black and STARLESS, is back once again as both artist and writer for SLEEPLESS.

With three equally alluring heroines participating in a wide variety of detailed, and lovingly illustrated and voice acted erotic scenarios, perhaps SLEEPLESS will prove to be a dream you'll never want to wake up from!