Heeey I need help once again

So my friend told me about this story but sadly she forgot the title but remember the plot
So it's a modern setting in Korea
And it's straight
So fl and ml lives in the slum and the ml is a taekwondo guy and he likes this girl and the girl likes him but they both thought that you know typical he won't like me
And the guy likes perfume
Yeah that's the only thing my friend told me haha
Kinda vague I'm sorry but thank you in advance