Probably the pool.
I just really like the idea of them hanging out and being bros. They're really sweet. My sons deserve love!
From left to right:
Kageyama Tobio (Haikyuu!!)
Imaizumi Shunsuke (Yowamushi Pedal, Yowamushi Pedal: Grand Road)
Furuya Satoru (Daiya no Ace, Ace of Diamond)
Haruka Nanase (Free! Iwatobi Swim Club, Free! Eternal Summer)