It was a nice read.

Beautiful art, smoking hot characters and a lot of smut. The seme is hella cute, like child/puppy/cat depending on a day. He blushes a lot which I personally looove ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄ The story is very interesting, has fantasy/korean folklore elements and a nice pace.
The only thing that threw me off a little was the whole guardian deal, raising him like for 10 years and then becoming a couple... Even though it was not grooming, it made feel a little weird. And how they treated the brother. I know he was an obsessive psycho in the past life but he clearly feels giuilty is better now and tries to atone for his sins...
Overall, worth my time.