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One day, Yunhyeok suddenly finds himself with a younger brother—Yunjae, a sickly child diagnosed with an incurable disease. Determined to protect him, Yunhyeok takes on the role of Yunjae’s guardian, raising him with unwavering devotion for the next 15 years. But as Yunjae grows older, he begins to push the boundaries of their sibling relationship. Then one day, through the security cameras Yunhyeok installed to keep an eye on Yunjae, he witnesses something he was never meant to see… (Source: Lezhin)

Han Boreum just wanted answers about his mysterious illness—not a death sentence. But the shaman he visits drops a bombshell: “You’re overflowing with dark yin energy. If you don’t sleep with a man full of yang energy, you won’t live long.”

Desperate to survive, Boreum sets out to find his “yang-guy,” and right on cue appears Joo Taeyang—campus heartthrob, top business student, and nicknamed “Apollo” by his admirers.

Perfect, right? Except... he’s a two-faced jerk only when it comes to Boreum.

Still, with his life on the line, Boreum launches a clumsy, tear-filled operation to seduce his moody match.

Between awkward attempts at flirtation and unexpected sparks, Boreum starts to wonder— Could survival turn into something a little sweeter?

A one-sided love? A healing romance? Or just a very chaotic medical emergency? Either way, he’s not going down without a fight!
(Source: mangaupdates)