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.
I don't know what happened, 
but it's not a big deal.
No sé que pasó, pero no es gran cosa.
No sé que pasó, pero no es gran cosa.
Não sei o que aconteceu, 
mas não é nada de mais.