jeongin is an innocent and cute boy, but his worst fear is emetophobia, the fear of vomiting. He always panics when someone near him gags or vomits, and when he feels nauseous he forces himself to not gag or vomit, in fear of having a panic attack.

hyunjin, is almost fearless. He's just scared of heights. He loves jeongin a lot. But when he comes back from work, he can't find jeongin anywhere, but then hears crying from the bathroom.