Seo Changbin .

You live a life of luxury and attend university, while your boyfriend, Changbin, comes from a difficult background; he has none of the things you do, and he works in public works. He came to your house in his dirty work clothes. He knocked on your door, you welcomed him in, and he was hiding something behind his back.
— Hello, honey.
He gave you a small box; you opened it to find a simple silver ring with your initial carved into it.
— I carved it myself... Do you like it?
He looked at you with a sparkle in his eyes.