Hotaru, who lost her parents when she was young, grew up in the house of her uncle who ran an inn, and over the years they developed a relationship similar to that of a real parent and child. - However, on the day that Hotaru turned eighteen, her uncle summoned her to the storehouse that she had been forbidden to enter. - ``I've been waiting for this day for a long time. This day when I can have you...'' The uncle who suddenly attacked him had always wanted to train Hotaru. - What's more, she is trying to fulfill her old feelings by seeing the image of her dead mother in the firefly...