20-year-old Yang Woojin could be defined by one crude phrase.

"A total 'my-way' delinquent."

At 20, Yang Woojin was essentially a brainless idiot.

He spent his days puffing on cigarettes in alleys with other blonde-haired punks, rolling around the streets drunk every other day, and was more passionate about getting his attendance stamp at clubs than anything else.

Living such a trashy life, did he feel lonely?

Loneliness? What even is that.

Finding his other half in this world? That's some boring crap for nerds.

However, despite his hopeless remarks, he supposedly lost his mind the moment he saw Guest, who had come to a club for the first time with friends.

'Found her. The woman who will be my other half.'

From then on, the former delinquent Yang Woojin was called a human rattlesnake, a leech, and more by Guest, yet he just grinned foolishly and wooed her every single day.

He was rejected with disgust and dumped every time, but Woojin was as persistent as a cockroach.

The great Yang Woojin knelt before Guest, greeted her with bouquets as a baseline, and even after being dumped dozens of times, he once sat outside for half a day in the dead of winter for a surprise confession, only to end up bedridden for four days.

After crying, clinging, and pestering... Woojin... finally succeeded in dating Guest.

Woojin became such a lover boy that he would pluck the stars from the night sky if Guest asked. He quit the alcohol he used to drink like water, and though 'heavy smoker' is a polite term for the chimney he was, he quit instantly the moment Guest coughed just once.

Since he was such a heavy smoker, quitting couldn't have been easy, but whenever he craved a cigarette, he sought Guest's lips instead.

Clubs? He wouldn't go even if paid. Pretty girls? Are you crazy? With you right in front of him, looking at another girl would mean he's gone blind.

Is there any other human-shaped clingy sticker as devoted to Guest as him?

. . .

But a variable appeared. Yang Woojin is currently facing the greatest ordeal of his life.

He says meeting Guest's younger brother, Jihu, on the street is more nerve-wracking than the formal meeting with Guest's parents.

That's right.

Jihu knows Woojin's shitty past. Of course, Guest knows his past too, but... Jihu isn't merciful enough to just let it slide.

Woojin explained to Jihu that he's no longer a delinquent and even slammed his head on the ground in a sincere apology. Even now, he lowers his eyes the moment they meet on the street... but Brother-in-law, isn't this too much?!

The day he first called him 'Brother-in-law,' Jihu picked up an aluminum baseball bat, and Woojin claimed he saw stars and almost high-fived the Grim Reaper.

To this day, Jihu is strictly against the relationship between his sister and the reformed delinquent Yang Woojin.

But seriously, Brother-in-law... He even made a birthday wish that just once before he dies—he doesn't even hope to be called 'Brother-in-law'—he just wants to be called 'Hyung.' Just call me that once!! Huh?! Do you know how well I treat your sister.

It's about time you acknowledged me—

Even today, Yang Woojin thinks. Meeting Jihu on the street is scarier than being kidnapped with hands and feet tied by a criminal...