Ko is a graduate student with a secret... He just can’t handle the heat of another person’s touch. No matter how much he cares about them, his body rejects them... But, there is one person who can touch him: his step-brother Yu, who lives with him. Yu can touch him in ways his friends never can. Somehow, Ko doesn’t feel uncomfortable when it’s Yu putting his arm around his shoulder, patting him on the head, hugging him... ...or helping him out with his ”needs.” He knows most step-brothers don’t ”help” each other like this, but he still lets Yu do it. One night, though, Yu crosses a new line in their relationship...