Although Allea was a highly educated imperial princess, as a young woman, she had little interest in the opposite sex, or at least in sexuality in general. That's why, when she was studying at the palace, she always attended the more important classes and avoided the less important ones on sexuality.
Neonidas had more or less guessed this, as he remembered from his memories that Allea had skipped those classes on several occasions, finding some excuse.
So now he wrapped his hands around Allea's waist and sat up and kissed her delicious lips. As inexperienced as Allea was, she was no fool, she could easily figure out how to have sex. Besides, she had already been secretly reading romance novels in her youth. She had learned a lot from them.
But she would think that kissing was a reality of this sexual union, so she imitated Neonidas' movements. Allea's tongue was entering Neonidas' mouth and using it just as he had just done.