Since Minawa (#370) is staying with Suguru and Mahoro, they use the pretense that she is Mahoro's younger sister, and that her name is Minawa. She has to attend school with Suguru, since she is supposed to be 14. However at school, she keeps messing up, and getting injured. Meanwhile, at school, Ryuuga and Slash know that she is from the Caretakers organization, so they too keep an eye on her for suspicious activity, since the Caretakers organization is not to be trusted.
