I wanna re-read this so bad!!( ＞Д＜；)

I cant really remember that much but it was tagged with yaoi and fantasy. It was about an elf that wants to work for the demon king and when they finaly meet the demon king gets blasted off by an omen or something on the elfs stomach bcs it was put their by the elfs grandfather bcs they were rivals with the demon king,and then yatta yatta they get together.

Pls help me find this!!!(/´△`＼)