Double Decker.

Double Decker (이층버스) is best described as a South Korean band which was formed to help fund cochlear implant surgery for deaf children and to help children with developmental disabilities. Their debut took place on March 25, 2018, with Like a Fairy Tale (Fall In Love(동화처럼)). Additional background says that Artists such as MAMAMOO, Pentagon, and BTOB ’s Seo Eunkwang have participated in activities with the band as special guests.