Un:Birthday Song ~Ai wo Utau Shinigami~

Hotori is your average high school student – except that she has 1 month left until her death. Two shinigami are sent down to earth have 1 month to watch over her and make sure she has no regrets left so she can descend into the after life. The two shinigami are Zen and Rikka, and if their mission succeeds, they will get a get out of hell free coupon to be reborn again. If they fail, they will be stuck doing shinigami work for all of eternity. Hotori starts to think about how to live her life to the fullest in the remaining time she has left, and one of the things on her bucket list is to confess to her crush Shizuru.