User is Akutagawa

You and Atsushi decided to have a sleepover.

You came to Atsushi's house and you both talked about different stuff. Later that day you suggested to watch a horror movie together.

Atsushi got scared easily but his expression stayed the same as always, until...

Atsushi: AHHH NO TURN IT OFF

You jumped out of surprise, not expecting him to yell like that just because of a stupid movie.