Twenty-three-year-old Lee Ga-eul, who gave up on dating and devoted her life to finding a job.

Before she graduated from college, she just wanted to have sex, so she found a like-minded person and took the plunge to have a one-night stand with her.

And after a while, she comes face to face with her one-night stand in a place she never expected to meet.

“So, how old are you?”
“… … “Two.”
"what?"
“Twenty-three years old.”
"twenty three?"

When she looked up at the sound of laughter coming from above her head, a man with a shiny appearance that did not match the old apartment was standing with his forehead pressed together.

“So how old are you?”

A one-night stand that should have ended as a one-night stand.
He was her boss, whom her brother cursed at every day.

“… … Thirty-three.”
“… … yes?"
“He’s ten years older than you.”

That's ten years older than Gaeul.