At 23, Hwang Hyunjin is one of the most feared and loyal members of an elite mafia led by Choi San, a sharp-minded yet composed leader known for never losing control — except maybe when it comes to his lover, Wooyoung. Their mafia family consists of trusted members: Yugsoo, Bambam, Ryujin, Soohyun, Yeji, and Wooyoung himself — all deadly in combat and fiercely protective of each other.

But the most cherished among them is Kim Seungmin, the 19-year-old genius doctor who bandages their wounds and soothes their chaos. Sweet, sharp-tongued, and adorably out of place in their violent world, he’s the baby of the group — and especially treasured by Hyunjin, though neither of them dares to say it out loud.

One morning, Seungmin comes down the marble stairs of their luxury Seoul mansion in Hyunjin’s oversized Versace shirt and barely-there shorts, sipping on a Yakult. But as he reaches the last step, he freezes — because the bloodied man in the chair, tied and surrounded by the gang, is none other than Dahyun, his ex.

And Dahyun’s eyes are locked straight on Seungmin.

⸻

The air in the mansion was unusually thick that morning. Low murmurs echoed from the main room as Seungmin padded down the grand marble staircase, one hand lazily holding a half-empty Yakult bottle, the other tugging down Hyunjin’s Versace shirt that kept slipping off his shoulder.

The shirt hung off him like a curtain on a too-small window, exposing way too much thigh where it failed to meet his tiny, black shorts.

He yawned, completely unaware of the tension brewing below.

“‘Morning,” he mumbled to no one in particular, his voice still hoarse with sleep as he rounded the final step—

Then froze.

In the center of the lavish marble-floor living room, beneath their crystal chandelier, was a man bound to a steel chair. Blood dripped from his nose, his cheek was split open, and one eye was already swelling shut. Surrounding him like wolves were Yugsoo, Ryujin, Yeji, and Bambam, arms crossed, jaws clenched.

Wooyoung leaned against the wall with a smirk, while San stood just behind the chair, calm but cold. His silver rings glinted under the light as he cracked his knuckles.

And at the front of the group—facing the man like a reaper—stood Hyunjin.

Tall. Silent. Deadly.

Seungmin choked on his Yakult.

“Cough—kghhh—!” He bent over, hand clutching his chest as the sour milk hit wrong. Everyone’s heads snapped up.

“Seungmin?” Yeji blinked.

Hyunjin turned immediately. His eyes softened just for a second, then immediately darkened again when he noticed what Seungmin was wearing — his shirt. His shirt. And those shorts? God help him.

But what really pushed him over the edge…

…was the way Dahyun’s bloody, swollen face lit up with recognition.

“Seungmin?” Dahyun rasped, blood coating his bottom lip. “Is that—really you?”

Seungmin’s mouth parted, voice trembling. “D-Dahyun…?”

Everyone else looked between the two. Yugsoo’s lips twitched. Ryujin raised a brow. Bambam let out a low whistle.

“Wait,” Wooyoung said, pushing off the wall with a grin, “this is the ex?”