Hate to Love Relationships

Uke
The uke is vampire who is constantly watched by a vampire hunter seme despite not hurting a human before. When he finally thinks he can settle down in Japan, the irritating vampire hunter is there to greet him, the uke really just wants to get away from all vampire hunters

Uke
The uke is a rich playboy who slacks off, not going to work, so his father has hired a live-in secretary to set him straight and the uke doesn't appreciate it. Little does he know, the secretary has a kink.

Uke
The uke hates school's popular 'hero' the seme, every girl he askes out replies to having a crush on the seme. To his surprise the seme confesses to him, to which he thinks he could use an advantage and act on revenge, but have the turn tables

The black haired one
He believes his lone classmate is the one who stabbed his brother in the past, and he starts to bother/bully him trying to enact revenge. However, upon following him, he seems to feel sympathy and catches some feelings.

Both
The two alpha families have been sworn enemies in the neighbourhood during childhood. The uke and seme would argue with each other protecting their younger alpha/omega kindergarten brothers but later became friends. Years later, as adults, their younger brothers are dating and they reunite after not talking to each other for 5 years as the uke realised he was an omega and went into heat cycle during during the time the left for america without giving a proper goodbye.

The brown haired one (it's a shounen ai but he looks uke)
He absolutely hates his demon boss and complains relentlessly to his online game friend, however this online friend is actually his boss and the two have no idea until their first offline meeting.

uke

Seme
It isn't hatred, maybe just slight dislike or annoyance. The town has two crime prevention groups, east and west. The two groups and their leaders (uke&seme) bump heads with each other. However the uke, secretly has a massive crush on the seme but the uke always spits a splurge of insults when he mets him

Sequel is Karasugaoka don't be shy!! 2

Both
The seme, second in command of the military base is cold and hostile to the uke, the doctor of the military base and the uke feels the seme clearly dislikes him. However the two now have to share a room together at the base AND THERE IS ONLY ONE BED.