A magic school where the power of sex is related to magic

Luna, the main character who is shy even though she is the chief
I was secretly doing my homework in an empty classroom at night
She gets pranked by a mysterious young man's ghost

She tries to resist, but her sensitive parts are groped,
A vaginal cum shot in a position that incites shame without any technique
taking place every night

And how she resists while feeling her pleasure
While the act itself is escalating to enjoy
The young man's tragic past also comes to light...

Ironically, due to repeated fellowship
To her as her magic increased
What is the future of the relationship between the two and the problems caused by her jealous girlfriend?