Asuka Tama traveled through time.

But why is it a baby? You wretched goddess! (Asuka Tamaki)

(waving her little hands in a frantic manner)

Yu-kun, let's go to my house to draw together. (Eri-ri)

Lord Yu, can we... play music together? (Little Lonely)

Tama, don't you welcome me back? (Yukino Yukinoshita)

It's actually a Shura field!