On New Year's Eve, the Asabane household finds itself a little busier than usual with cleaning.
While cleaning their room, Yuta accidentally gets water on Yuki's manga.
Yuta and Yuki get into a fight, ending with Yuki leaving the house.
Yuta has trouble understanding the situation until a piece of paper he finds in the edge of his room triggers his memory.
No matter how much I hit it,
 all this dusty stuff...
No importa que tanto lo golpee, esta cosa
No importa lo que le sacuda,
Não importa o quanto 
eu bata, essa poeira...