Rui one day worked on his invention which was to be useful for the performances of their group - WxS. however, the machine doesn't work as it was supposed to and Tsukasa ends up turning into a baby! Rui had no idea what must have happened for his boyfriend to return to his form from a few years ago, but he was stressed..

"oh no no no... Don't cry!" Rui said as he looked at little Tsukasa who was sitting on the ground and looked like he was about to start crying.