Haruki smiled like a fool for having won a heart from Jun by giving him the key. Moments earlier in the bathroom. And Jun released them from prison with his ability to open locks, learned from the times he lived on the street. He had made the promise that he would tell Haruki a little bit of his story, so he shouldn't be too late at the ball.
The singer found Miyu-chan smiling and still entertained by the company of Hinata-kun who gestured animatedly while they talked, 'They make a beautiful couple.' Haruki found out.
The couple hadn't noticed his return, and they didn't even seem to have noticed his prolonged absence. And he was thinking he was necessary!
The two were so connected to each other that they also forgot the cat. Mimi was playing catching the flowing fabric that hung from the asymmetrical skirt of a hologram woman dancing with her partner.