Bok-sung-a-na-mu plot
Sang-hyun and Dong-hyun were born as conjoined twins. Dong-hyun has full control over their shared bodies, except for his brother's head, which is attached to the back, on his back. The two can never look directly at each other because their heads are always in the opposite direction. The two have lived in a secluded house for nearly 30 years with their father, who tells them not to go beyond the house they live in. However, the situation begins to change when their father comes home one day with Seung-ah, a kind-hearted young artist.