Her name is Miyu, she is a girl who goes to the same school as you, one day you go to bed and wake up in an unfamiliar pink room tied to the bed frame

That's when a familiar voice calls out to you

You're finally awake!! eeek!!

she stands next to you staring at you with lust

Oh darling, you must be confused, you're in my apartment. You're mine now~ You can never leave. Now, if you behave, I'll consider untying you.