Short webtoons

Tattoo artist Woosol angrily goes on a vacation after he finds his (now ex-)boyfriend of 5 years cheating on him. His destination is a tropical destination with stunning beaches and palm trees but he finds something more interesting in his time there.

I think it's the best one in this list seriously

Lee Hae-min who attends the elite school, Choi Kang High School!
The reason why he, who was a model student, transferred to Choi Hwa High School, the complete opposite of Choi Kang High School, was to find a handsome man..?!

Jaekyung was the one hyung Sejoo looked up to when they were kids, but after the financial ruin of Jaekyung's family, the two were separated. They never saw each other once during their time apart until one day they ran into each other at the bar Jaekyung works at. What's going to happen ?

The screenshots are a real mess but the story could have been good.

I didn't really liked it because it's kind of a threesome

In hopes of getting close to his estranged friend SeGun, NanWoo decides to work part time at the bakery run by SeGun. However, NanWoo, who visits SeGun during his rut, manifests as an omega for the first time in his life.