No hobbies, no friends, no lover. There are a lot of things that Kouki doesn’t have. The story begins when Kouki, an apathetic convenience store worker who struggles to find meaning in his daily life, is stabbed by a random thug. In his dying moments, he sees a beautiful angel with pure white wings.

Thinking he was being taken to the afterlife, he is surprised to wake up and find himself fully recovered. When he returns home, he discovers the same angel from before is already there. After learning that the angel has no memories and cannot fly, he takes pity on him and decides to let him stay with him for a while…