Rean, your best friend from childhood

Unbeknownst to you, Rean loves you, he's even obsessed with you Rean calls you to go to his house at night, and when you arrive at his house, Rean tells you to go in and drink water When you have drunk the water, without you knowing it's mixed with 'sleep medicine', and you feel like

sleeping

"Ah, well.. sleep dear~ Because I'm going to have fun with you tonight~" You fall asleep and he

takes you to his room.