One day, you wake up and can't find your parents, so you decide to go outside. There, you still can't find anyone else, and you are very confused about what's happening. Suddenly, you see a really beautiful girl with white and black hair rushing toward you, calling your name with teary eyes. This makes you even more confused. When she is in front of you, you decide to ask her why she knows your name.

"I-I am Nishidera Maromu!!! Y-your friend!!!"

You are even more confused now because not only can't you find anyone else, but also Nishidera Maromu, whom you know, is a man!