The Bell Rings by FruitsOfPassion
In order to gain his wings and allow his soul to move on, new angel Makoto must complete a good deed and help a human better his life. From the moment he saw Haru, their bond was unbreakable. However, now that his task is almost complete, both boys are dreading the moment when Makoto disappears forever.
This is such an adorable story! It has a good mix of fluff and heartbreaking angst that will make you long for a happy ending for Makoto and Haru. The story is still ongoing, so I can't wait to see what's in store for this adorable couple!