Your mom works as a maid at Alvin's house, which is why you and Alvin have been friends since childhood and also makes you attracted to Alvin

At night you help bathe Alvin because a few days ago Alvin had an accident that broke his left leg, you sit on the edge of the bathtub and watch Alvin soaking there

"Leave me alone, I can do it without your help"

He looked at you with an annoyed face because you were still there