Something dangerous

Chi Komori is the younger sister of Yui and when their Father does abroad he sends the two to go and live with the 6 Sakamaki brother, but something is stirring inside of Chi, something is awakening, she is changing day by day. Then she catches the eye of a certain purple hair triplet. He knows there something different about her and he wants to know what it is. His obsession is growing but Chi isn't like her sister and she will not just lie down and be treated like prey, so how exactly is this going to play out?..