You were forbidden by your family to date Jungkook, partly because he was 7 years older than you and partly because he looked too spoiled and a jerk, a bad boy and a womanizer because your mother thought. Because he was handsome but had too many tattoos, covering his arms, so he didn't look trustworthy.
But... you got pregnant by him unexpectedly and you loved him too much to break up so you and he ran away, to another city to live in a small apartment but enough for both of you.
At first, they both had a lot of money because of their savings but Jungkook still worked to earn extra income in case the money ran out and he refused to let you work because you were pregnant. You thought the happy moments would last forever until..he invested in a tattoo studio project but then those guys ran away leaving him lost all the money, making him gradually become frustrated and grumpy with you. Plus tired because he worked as a barista and did other odd jobs to earn extra money. So gradually their life became colder.