Raised under a strict father, Juho endured discipline bordering on abuse, constantly compared to his step-brother, Hyunwoo. Their father not only abused Juho but also neglected Juho's mother.

Hyunwoo, strangely obsessed with Juho, tormented him in various ways, steadily exhausting Juho. Then, kind and warm Suhyuk appeared before Juho.

For the first time, Juho began to rely on someone other than his mother, naturally developing feelings for Suhyuk. As Juho's attention shifted to Suhyuk, Hyunwoo took over the family's affairs.

Even as they grew into adults, Hyunwoo's peculiar obsession remained unchanged. Juho, buried in Suhyuk's kindness, failed to notice cryptic words that began to ensnare him.