The artist drew his ears like that on purpose, i am not sure if there is an official name for them but most people call them mushroom ears and they turn like this after Years of being pulled and punched so it creates blood clots and damages the tissues ! there is a lot more about it too !
The art syle looks so gorgeous however, why are Jaekyung’s ears be looking like that? ヽ(`Д´)ノ