These ones are non-smuuut:
1. Minority (finished; they're classmates; uke is passive while the seme has abusive father)
2. Night by the sea (ongoing; the uke has debt and the seme's the collector. Uke also has a cuuute younger brother)
3. Don't Be Nice to Me (ongoing; seme's popular, the uke has a crush on him. Uke also has financial probs)
4. Serious Joke (the 1st couple's story is finished, two classmates in love yet uke is traumatized. The second couple's story is still ongoing, it deals with the uke having abusive father and seme tries hard to help me)
5. Eternal Contract (ongoing; fantasy; both have powers but uke tries to conceal it)
6. Spinach Bouquet (ongoing; seme is a city boy who migrated in the countryside. He then gets entangled with the odd country boy)
7. Heat and Love (ongoing; this one's a bit spicy. Uke gets sick which seme uses his body to help)
8. Cold-Blooded Beast (ongoing; kinda spicy; seme turns into a snack, uke hides and take care of him)
9. Please Fix My Heart (ongoing; uke's a country boy and met city boy seme. Seme has past while the uke experience gay awakening)
10. Steady Affection (ongoing; two best friends, seme is secretly in love with uke and suggested they should date which the uke laughs)
11. Bongchon Bride (ongoing; u probably already know this. Basically a slave and master relationship)
12. The Pizza Delivery Man and the Gold Place (ongoing; uke has financial troubles while the seme has trauma. They helped each other)
I have more reco but most are short mangas.