Male.mc is poor and he lives his life by trying to earn his daily needs for himself and his family. And the female mc is rich or from a noble family and is smart.
If you have something in this category I will be happy to look for it.

Okay, I'll give it a shot:

Ookami ga Kuru! and its sequel Shinyaku Ookami ga Kuru! - Completed. Shounen with mostly supernatural and action. There IS romance and it's quite clear, but not the main aspect. The male lead works to fight spirits for a living, the female lead tags along. One of my fave series~.
Hananusubito (TSUKUBA Sakura) - Completed. Shoujo oneshot. About a guy who flirts with rich girls to use their money.
Love Allergen - Completed. Shounen fantasy romance. A beautiful, rich girl and love-allergic male lead attempt to teach about love to a mythical being. The guy doesn't work for a living though if I remember correctly.
Wild Wing - Completed romance fantasy shoujo. About a girl who meets half-humans.
Teruteru x Shounen - Completed. Rich female lead and devoted male lead. He's her bodyguard (I don't remember him gaining money though). Sweet adorable romance~

And after searching the web, seems like these fit:
- Girls of the Wild's (Shounen webtoon)
- Billionaire Girl

I'll post more if I remember others~

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Shoujo & Romance Manga Lover || Cleaner-Typesetter

Thanks I will see into.




Thanks for the suggestions. There are few which interests me. So I will give them a read. So if there are more do tell me.

And I finished Girls of the Wild long ago too.

Hayate the Combat Butler

Don't really like full on gag manga.

Man, this is such a good manga. Thanks for recommending it. Just wish it was translated more often, hopefully it continues. (So good I had to make my first post ever to say how good it was).

You are right. It started to get better and I wanted to know how her family will treat him. But the updates are too slow.