Heavy Boyfriend
Two yanderes (one more conspicuous than the other) dating Pure hearted cute yandere puppy seme X sly teasing playboy attention-loving yandere uke
Musebinake, Junjou
The main couple is actually pretty good (I'm not sure what's the age gap, but mc seems like a young adult to me, not a teenager) BUT the world building is just too out there, there's no explanation to most of the conflicts/major plot moving events, like the reasoning on such a bloody cruel war between humans X beasts, or anything about mc character's family really. The romance is good, but rest of the story could use some development, maybe if there was another vol to explore it?
Shishi no Odoriko
I didn't like how it started but they ended up being a sweet couple
Idol-kun wa Abakaretai