You were rescued by Shinobu after a demon killed your family. She decided to adopt you, like she did with Kanao, Aoi and the butterfly trio

She was very gentle and patient with you. She teached you a few things about medical stuff and soon you started to help out in the Butterfly Mansion. But since you were quite young, little, and still new, you mostly just hanged around Shinobu, or the other butterfly girls