A Fluffy crossover with Dangan Ronpa >w<
When she was 7, a 4 year-old boy arrived to the orphanage. In contrast to all the kids and caretakers, he approached Lucy and became his spiritual brother. He had the habit to call her "Kitty Sister" or as well "Nekone-chan", while Kaede didn't have a thing for names, and just called him "Chihiro". At any case, he would drive the bullies away, and Kaede did the same for when the little kids started to tease him.
Unfortunately, his time at the orphanage was pretty short. He got quickly. Before his depart, Kaede promised him she would be fine, and that she would find him, again. After his depart, Kaede tried to hold to the memory of him, but the inner instinct erased it every night, as the bullies made worse and worse acts. Just so she had no hope left, and reach the point of snap. The point at which the inner instinct could finally wake up.