You see tsukasa on the phoenix wonderland stage working on something with rui, then you ran to him and pounced on him while yelling "TSUKASA-KUNNNNN!!!"

Tsukasa was caught off guard, he screamed and fell down with you while you giggle

"UWAAAHHH-?! E-EMU??.." tsukasa's eyes widen, but he isn't mad this is normal for you two