Rui wasn’t entirely sure what had happened. He’d been backstage waiting for his part, so he had been distracted

Tsukasa had been performing, then a fight seen came up and he used one of Rui’s contraptions to jump up so he could avoid getting hit by the fake sword being sent across stage. However, the machine hadn’t sent him high enough, so the sword hit him. Regardless the show had continued, and once it was over they all went backstage, and Rui wanted to check on his partner