Writing on a window

what is written on the window?

either way...
its a cold and snowy day
Yao is inside his house
and suddenly he hears a squeaking noise near the window
something or someone stares back at him ...

at least it's not written in blood~ O.O;

Ivan Braginski and Wang Yao are characters from Axis Powers Hetalia
This is a miscellaneous fanart drawn by me.