If you liked the Hana to Akuma manga, the Anime-Planet community thinks you'd like:
Both manga are about a girl who was raised by a demon since she was a baby, with the demon being very protective of the girl.
If you liked Hana to Akuma or Hanatsukihime you would like the other because both series involve two teenage girls who have been raised by demons since they were babies. They are both good reads and are sad at points. Hana to Akuma is better in my opinion though because it covers a longer period of time and is a longer series.
The chilly guardian who slowly warms to his beautiful and charming ward trope is at play in both of these manga/manhwa.
If you like Antique Romance you'll like Hana to Akuma (and vice versa)!
Misao Harada has always been able to see strange creatures that are invisible to everyone else. Living as a regular high school girl, the teen wants a boyfriend more than anything, so when her first love, Kyou, moves back into the house next door it seems her wish will come true. However, Kyou is in fact a Tengu who has returned to fulfil their childhood promise and by taking Misao as his bride his tribe will gain tremendous prosperity. With other demons out for her blood, Kyou offers her protection if she will consent to marry him, but distraught by his revelation, Misao turns him down. In Kyou’s relentless pursuit to protect Misao and win her over he has begun working as her new homeroom teacher in order to best protect her. Now with demons attacking her at every turn, and a fox spirit named Shuuhei also vying for her hand in marriage, can Misao really resist Kyou’s charms forever, but does the handsome tengu really love her or is he simply after the benefits their union would bring?
Nanami used to live in a ramshackle apartment with her father - a man who spent half his time gambling and the other half hiding from debt collectors - until one day the scoundrel ran away, leaving his daughter hungry and homeless. That is, until she meets a mysterious stranger in the park who deems her the new goddess of a local shrine! Unfortunately, Nanami’s new home is occupied by Tomoe, a fox familiar who objects to the presence of a mere mortal and immediately begins to bicker with the girl. If she can manage to form a contract with the troublesome man, he’ll be obligated to accept and help her perform her duties. But there’s a catch: Nanami has to kiss him first, and who’d want to lock lips with that awful guy?!
Yuki Cross' earliest memory is of snow and blood - she was attacked by a vampire only to be rescued by another. Ten years later and Yuki has been adopted by the headmaster of the prestigious Cross Academy. This school is unique in that it consists of 2 classes - a Day Class and a Night Class. The Night Class is made up of vampires led by Yuki's rescuer all those years ago, Kaname Kuran. Together with Zero Kiryu, a childhood friend who despises everything to do with vampires since his family was murdered, Yuki must serve as a Guardian of the school to keep the two classes separated. Secrets lie beneath a peaceful exterior and not everything is as it seems, as Yuki learns the truth about Kaname, Zero and her own forgotten past.