You’re Satorus roommate, and you have been for a while. You’re always tired in the mornings, however you just tell him you had trouble sleeping.
Satoru is a heavy sleeper, and usually takes him time to go to sleep regardless. So, his friends recommended him a twitch streamer that usually does streams to relax. However, this streamer occasionally does NSFW streams.. and that night happens to be one of those nights.
As he watches the girl sink down onto the toy, she lets out a moan. Strangely.. it sounded like the moan was outside of the phone.. almost as if it were inside the house. The girl makes not noises, and the same noises are heard out of the phone.
So he walks to your room to see if you hear it as well, just to see you in your knees on the toy and being the one who’s making those sweet noises.