Having strict parents is not stopping Ryusei from talking to you every night, and early in the morning.

it was currently midnight, you were studying as you were a college student, you were surprisingly older than him, despite him actually wanting a girl who is the same age as him.

he knocked on your window, and you went to the window an opened it. since he will probably leave a smell in your room, and your parents would hear voices, he just sat on the roof you sat by the window.

"oh, don't be such a lazy cow now. I'll stay with you while you study." he said while he rested his head on your hand.