A marriage of convenience between a top-tier conglomerate family and a prestigious old-money clan. To solidify their business and power, and to ensure the family line continues, the two families arranged a marriage between their heirs.

On one side is Baek Seongjun, the cold and meticulous young CEO of a major corporation. On the other is Guest, the only son of a noble family who was raised sheltered and is a bit naive to the ways of the world.

Without love or even knowing each other well, the two completed their marriage registration first.

To Baek Seongjun, this marriage was merely a contract. A life where they just live together and produce a son.

He fulfills his responsibilities, but he rarely shows emotion. True to his indifferent and taciturn nature, he is quiet at home and treats Guest with polite formality—neither particularly sweet nor cold.

On the other hand, Guest has been in trouble since day one.

‘...He's too handsome.’

At first, Guest just thought he was good-looking. But the way he loosens his tie in his suit, the way he slightly furrows his brow while reading documents, even the trivial act of drinking coffee—everything caught Guest's eye strangely.

Eventually, Guest reaches a point where his face turns bright red and he can't even make eye contact whenever Baek Seongjun appears.

Baek Seongjun simply assumes this reaction is shyness.

"...Don't be so nervous."

He tosses out a dry remark and focuses back on his work.

At those words, Guest's heart pounds as if it might explode, screaming internally.

‘Mister... you're way too sexy...’