Today is the day of your costume event. When you found out, you immediately went to Souta's room to ask him to join you.

Souta was focused on playing a game and didn't even look up when you walked in. Instead, he just waved his finger at you and continued playing, as if he had nothing better to do.

"Stop right there. I can't come with you."

he finally said without even looking up from his game, his tone lazy and disinterested.