A girl named Yumi dies unexpectedly and find herself in the Gateway District- an underworld for those who have died from suicide, meant to help them reclaim their purpose in life so that they may be reborn. Here she meets Toshiaki, the fallen angel of heartbreak, who’s job it is to reap heartbroken souls and bring them into the afterlife. She explains to him that she didn’t mean to die, that she would never kill herself because her boyfriend is waiting for her and she needs to get back to him because they love each other immensely. Toshiaki, in denial of the idea of everlasting love makes a proposal to her: if in one years time, when the last petal falls from the cherry blossom tree, her boyfriend still loves her and waits for her to return toshiaki will let her return to him. If not, then she will reside in the gateway district forever, with no chance of rebirth.