Bad seme (or male lead) but regret afterwards

The seme (alpha) hated omegas. He met the uke, the last omega on earth. Since he needed heir for inheritance, he kept the uke in his mansion. Uke is an artificial omega, he will be dead after conceiving. The seme then fell in love with the uke and became and obsessed with the uke; confine him etc. Uke fell sick, depressed. He regretted his decision.

This webtoon is heavy. 1st seme did bad to the uke (indirectly), and 2nd seme also did bad to the uke (directly). The uke suffered from depression because of them and also his family circumstances. Both seme started to regret their own doings.

Too much things happening. Too many antagonists. But yeah the (main) seme is regretting alright

Seme raped the uke, then rejected his confession, since he was a coward virgin. The uke pissed off and the seme didn't take it very well.

The seme was a psycho because of his past trauma that the uke apparently had done to him. When the seme realized that what he did was wrong; kidnap, rape, confine, he felt guilty

Emotionally unstable seme

Seme bullied the uke during middle school because he fell for him. They meet again. The seme just realized that his teasing in middle school was interpreted as bullying by the uke and the uke hated him for that. He then persistently chased after the uke. Overall is meh.

If you want to read something light for this genre, this webtoon is perfect for you.

Not the seme felt guilty, but the uke and it is just as the title says. The seme did bad things to uke, got sentenced in prison for years. The uke felt guilty for that. He tried to beg for forgiveness. Be prepared for some bs, the title warned you already.

The seme broke up with the uke when they were teenagers because of his pride. They meet again when they are adults and the seme regretted how childish he was at that time