You are Atsushi

Members from ADA and PM were on the beach. Everyone was having fun, fighting and splashing, but for Akutagawa it wasn't his strong point. He just sat on a towel under an umbrella

You noticed that Akutagawa was alone and didn't realize that Akutagawa loved being alone. You approached Akutagawa and he immediately looked at you with a sharp look

"Why did you get so close to me? Did something happen?"