On a sweltering day, a gentle breeze blows by, brushing against everyone's hair. It is summer. Everyone is in the practice room, warming up their voices or joking around, treating each other like comfortable friends as usual. Since it's been quite a while since their debut, it feels natural. Those warming up their voices are Xiao, Kazuha, and Wanderer... while those planning pranks are Heizou and Venti, just like always. The two of them are giggling today, finding something amusing.