A girl in a sexy costume. Her name is "AI". She looks pretty and obedient by appearances, while actually she is a warrior from the other world. She uses the name, "Ai Kagano", in this world. She involves a feeling of loneliness, but on the other hand, she is destined to be an unassuming and patient warrior who fights for the other world. She is so stubborn that she fences around her and that she does not accept others. Yes, she lives in solitude. It is you who should be the only support for her.