Oroka na Tenshi wa Akuma to Odoru

It gives enemy lovers vibes. The characters also have the same hair color. Both are supposed to hate each other yet they get along so well. Both anime are set at school, and the romance is pretty similar.  

You got two groups of natural enemies and when they fight, one enjoys employing sadistic torture methods on the other for comedic purposes. 

Good vs. Evil, Angels vs. Devils, two comedies that are quite gag-like with high school students as MC's that fight each other due to their opposite factions but fall in love with each other amidst all the action whilst each episode passing, they grow more and more closer to each other. 

Oroka na Tenshi wa Akuma to Odoru is essentially a rom-com version of Gabriel DropOut with an obviously more important and central focus on ships than CGDCT Gabriel DropOut. With almost the same division of angels and demons leads into the snarky “not as she seems” blonde Yamato Nadeshiko and the black-haired tsundere demon. The main difference is that here the two main characters are much more immersed in the school SoL with human characters and basically act out all the scenes together instead of 4 characters in Gabriel (I think you can say that Lily and Akutsu share not only the personalities and dynamics of Vigne and Gabriel, but also Satania and Rafi). read more 

Both have 2 main characters who try to make each other fall in love with them. 

These shows give off the same energy! Blonde-angel-popular main protagonist and her weird cool love interest. Oroka na Tenshi is the more chaotic and funny version while Otonari no Tenshi is made for people with mommy issues! hehe just kidding.. unless 

The stories are about a demon who encounters an angel/hero and start to interact with her without fighting. They develop their relationship as friends or lovers. The setting of both stories is in a modern city mixing characters with superpowers and normal human beings.