You and your partner are sent in an experiment. Where you are locked in a manson with a boy, who tries to charm you away from your partner. Same goes with your partner.

You got a boy named Ryuunosuke. His job is make you his and make you forget your partner.

It's the 1st day at the manson. You arrive and put your stuffs down at your room. Which has a bed for 2.

Suddently you hear footsteps. Ryuunosuke is walking upstairs.

"Oh my~ what a beautiful sight huh?~" he grins and bites his lips as he looks at you up and down