Samjams

https://www.mangago.me/read-manga/so_who_got_screwed/

Thanks! But I already finished that

It's popular so maybe you read it but mine is define the relationship

That was harder than I thought. Like a lot that are sweet actually have some kind of bitter taste at some point, or at least what I read. If this helps:

Kisses x kiss x kisses
Dasadanan
My guild mate next door
Behind the scenes scandal
Faded first love
All about lust (I read it quite a while ago so I hope it doesn't have angst and it's good cuz I don't remember much)

If you're up to a bit of angst and complexity but still happy ending and cute

The eve festival
Minority
Spinach bouquet

I'm currently reading don't lie and it has been sweet but I don't know if it won't have angst and is still not finished

Hope it helps

https://www.mangago.me/read-manga/haru_to_natsu_to_nacchan_to_aki_to_fuyu_to_boku/
And old fashioned cupcake by the same author

https://www.mangago.me/read-manga/here_and_there_and_us/
and its sequel
https://www.mangago.me/read-manga/achira_kochira_bokura_no_are_kara_to_kore_kara/
https://www.mangago.me/read-manga/moratte_kudasai/

Bro... Don't lie has angst and I wasn't prepareeeeee like they were so cute for a moment and then...

https://www.mangago.me/read-manga/nagahama_to_be_or_not_to_be/
https://www.mangago.me/read-manga/family_now_and_forever/

Necromancer Survival. They fumbled the genre of the story. Toned it down super bad they made it downright comical from heavy action angst

i wouldn't call them the worst adaptations...but i was pretty disappointed by the adaptations of queen of snow, oil on canvas, and piercing stab. rather than flowing like actual stories, they felt more like half-hearted illustrations of the key events from the novels

queen of snow especially, for focusing mainly on the romantic relationship between the two main characters instead of the whole plot around them developing a relationship in their personal lives while not knowing that the political opponent they're both trying to chase down and eliminate in their professional lives is each other. which was by far the most interesting part of the novel

on the flip side, an example of a good adaptation is payback. i think the manhwa conveyed yoohan's inner feelings during the filming of his character's suicide better than the novel did. i think there were some scenes between jay and yoohan added by the manhwa artist that weren't in the original novel but really added to the sexual tension and chemistry between them too