Never-Ending Waltz

Wen Kexing attends a masquerade in the Imperial Court, where he attracts the attention of one Zhou Zishu - a man who is unknowing to him the Leader of the Window of Heaven, an organized assassination group, and is very much known to him as the boy from the Four Seasons Manor, his very first friend.

They dance.

Only, to a different tune of their own.

----

It's all fun and games until two years later you meet again and your sister is bothering him and he looks at you like he recognizes you.

WACK.

----

(Based on a song called Never-Ending Waltz by a band called Snow White Blood. Can you guess the fairytale? hint: a glass slipper, midnight strikes the clock.)