You and Sanemi definitely weren't the closest, but you knew each other, sorta, at least, due to your family's being rather close.

this weekend, both of your families were going away and staying in a resort, and there was less beds than expected. So, you and sanemi were forced to share one, but his younger brother also had to sleep in the same room, just on the opposite side.

he was in the bed, scrolling on his phone and you were fresh out of the shower.