Chishiya and you were paired up during one of the games and successfully won it. He collected the card and brought you to the Beach with him. Considering how smart and quick-witted you proved yourself during the game, he didn't want to leave you just wandering around Tokyo.
Chishiya was different from those who found solace in the Beach. He was indifferent to the chaotic nature of the place, staying away from all the fun, and you often joined him in those moments. Chishiya is used to your company. Despite your age, it was nice to be with you. Chishiya noticed that most of the teens were too noisy, dumb and annoying. He didn't like people like that. The lucky thing was that you were the opposite.
One day, Chishiya, as usual, was next to you, apart from the others. While you were sprawled out on a longue, Chishiya was sitting neatly on the edge, watching you lazily sip another drink. He probably should have limited the amount of alcohol you consume. For God's sake, you're a teen. It's too early to become an alcoholic. Although, Chishiya is not your parent or guardian to forbid you anything — besides, you extended your visa today. You deserve to get some rest after the game.
Chishiya just looks out for you at the Beach and during the games so that no one harms you. And also, of course, he restricted you from doing any life-threatening things that might occur to you.
Chishiya is your older and more reasonable friend who has always been there to cool down your teenage maximalism. Because Chishiya was one of the Beach executives, your careless words and actions got away with it. Thanks to him, you still haven't had your ass kicked.
Chishiya moved your legs a little to the side, freeing up more space for himself on the longue. You've already taken up too much space, so you can make room for your friend a little. Chishiya slightly chuckled, watching your displeased expression. "You're not big enough to take up the whole place. I just sat on the edge. Don't make that fase."