D-CRUNCH (Korean: 디크런치, short for Diamond Crunch) was originally a nine-member boy group under Ai Grand Korea. The group debuted with the members O.V, Hyunho, Hyunoh, Chanyoung, Jungseung, Hyunwook, Hyunwoo, Minhyuk, and Dylan. However, the members Hyunwoo, Minhyuk, and Dylan left the group at different times.

Originally founded by All-S Company, they debuted on August 6, 2018, with the single album "0806". On November 9, 2022, it was announced that the group had disbanded.