Longer sexy romance

Season 1 (1-23): Xiaomi, an omega, has been in love with the popular Jiang Xi, an alpha, since middle school... Even though they both changed over the years as they graduated and started living different lives, Xiaomi's feelings have not changed. It is painful to experience an unrequited love for 10 years, is it not? But what will happen when Xiaomi brings an intoxicated Jiang Xi home to his bed after their university's graduation party.
There are two more unrelated series after.

Computer science major Chu Sangwoo is the epitome of an inflexible and strict rule-abiding person. While working on a liberal arts group project with freeloaders who don’t put in any effort, Sangwoo reasonably decides to remove their names from the final presentation.

But he didn’t imagine how involved he would become with the person whose study-abroad plans were messed up because of that project. The involved person: the campus star who everyone knows, Department of Design’s Jang Jaeyoung. He