Boys' Love Novels Royal Kiss. Hot and melted. Kadokawa Ruby Library

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Her second prince, Ilaria, who grew up in a box so much that people around her were worried about, meets Reinhardt, a beautiful businessman who is said to be the flower of the world of society, at a party she happened to attend.
Attracted to Ilaria, who reveals her worries about becoming an adult, Reinhardt takes her to her villa and gives her a kiss lesson, saying, "I'll give her lessons for adults."
With the sweet feeling that she has never experienced before, Ilaria forgets her status and chastity and falls in love for the first time in her life, but she knows that he is the person whom she can never marry?