PLEASE READ DESCRIPTIONS BEFORE YOU PLAY GAMES I PLAYED THIS AND IT BURNED A HOLE THROUGH MY HEART IN A MATTER OF MINUTES
The part with going pale and shaking is very concerning. Please take care of yourself.
That said, as far as NTR is concerned, Luna is one the more humorous side of things. Other games I've seen, our past games and especially the next game we have planned after this all are considerably darker than Luna's story. It would probably be a good idea if you avoided this genre entirely!