What had she been protecting, was it a bond or a cage?Having lost their parents, twins Himari and Kaoru grew up with only each other as their entire world. “As long as I have Kaoru, I don’t need anything else”, Himari strongly believed in those words. But one day, after school, she came across and witnessed a side of her brother that she’d never seen before. A girl standing far too close to him. An unfamiliar, bewitching look on Kaoru’s face. From the moment she understood what love was, the delicate world the two of them shared began to quietly shake.