Sang-gu is a student who's struggling financially and is a hypochondriac due to trauma from a childhood accident. Younghui, on the other hand, is the “it” girl of the famous K-Pop girl group, Sugar Red. Immediately after Younghui meets Sang-gu, she chases after him because of the "delicious" smell he has. One single bite of your blood for 10 million won – will you take the deal?