Hate to Love Relationships 2

Both
Revenge

The uke is a half imae creature who lost his human father after making love with his imae mother. Its said when an imae has sex with a human, the human becomes poisoned and slowly dies. The infamous Black Martial Emperor seme massacres the imae village, killing the uke's mother. The uke wants revenge and slowly poisons the emperor through sex.

Red flag seme (like rape etc.)

Both
Prince x Guy Who Doesn't Care He's Royalty lol

MC is a prince who goes to a normal high school on his request. He doesn't want to rely on his father, the king's power to get what he wants. But upon meeting the overachiever ML, the two butt heads and the MC becomes infuriated the ML talks to the prince with clear disrespect.

webcomic has been dropped, but there's the novel on tapas and amazon that is complete

Seme
Nerd x Actor Student

The uke's girlfriend has expressed how she's into the 'nerdy look'. He then begins observing and following the seme in his class, who is textbook exactly what his gf is into, a 'nerd'. The seme immediately dislikes and mistakes him for being a pervy 'stalker'. But now suddenly... they're roommates.

Seme
Jerk Playboy

The seme is a playboy who changes girlfriends within a hat. The uke is obsessively in love with him. To try to make the uke give up, the seme mistreats him and tells him to confess every day. But no matter how many times the uke gets rejected, he doesn't seem to give up.

I read it on batoto, the chapters here seem jumbled. If you like jerk semes becoming simps, you'll like this

Uke
Stressed Recessive Omega x Stern Alpha Boss

The uke has manifested into a recessive omega due to stress. He absolutely despises his alpha team leader at work due to being a strict boss causing said stress. He even opens a saving account for the purpose of hiring a hitman to get his boss (for comedic effect). But his pheromones cause him to get more involved with his team leader...

Seme
Ship Captain x Male Escort

The uke is an escaped slave who was told by his mother to flee to the south. He needs to take a ship but has no money. So he gets hired as a male prostitute for a ship. The captain of the ship immediately hates him, as unbeknownst to the uke, he looks similar to the captain's ex lover who was also a prostitute and betrayed him.

Uke
Tattooist x Gangster
Nameverse (Soulmates)

The orphan uke, called 'April' is a tattooist that often tattoos gangsters, even illegally tattooing over, removing people's soulmate names. In this world, people's soulmate's names show up on their body but the uke's hasn't appeared yet. Suddenly the gangster seme takes interest in him and his services to remove the name on the seme's body. The uke finds him infuriating and irritating to deal with.

Uke
Opposites Attract
Playboy x Innocent Virgin; Tattooist x Salaryman

The two are neighbours and the uke mistakes the seme for having girls over having loud sex every night, getting the uke no sleep. His hatred for his neighbour grows as so does his judgement over his tall tattoo'd appearance.

This playboy becomes whipped

Both?
Rejected become the rejectee

Uke falls in love at first sight with the seme at the train station. Unbeknownst to him, that very guy is his new boss at work who works him to the very bone. What he also doesn't realise is his crush/boss is the very guy he rejected in high school, claiming good looks and height mattered to him. Now hatred is fuelling in the uke's blood as the seme is taking his teasing and revenge too far in the work place.

Both
Childhood Rivals Body Swap

The two have hated each other since childhood but suddenly they've now swapped bodies.