Tsuki no Ran is just a normal college student like everyone, but behind those stone cold eyes is an extremely skilled assassin who was trained since birth. Having very little social experience, Ran struggles to find a place in a world that has moved on without him. That was made even more clear when he meets the Belle of Campus, Taiyori Ayaka, a popular girl who only has bad things to say about him. The dangers of the underworld was the easy part. Now, the hard part is trying to be ordinary when he very much wasn't.