Seems like red is stuck in a time loop, my guess is that she wants to spread photos of the witch and the alien, and possibly until she does that the loop will continue, she became able to get perfects results because she already knows the exams content or had to study to become able to accomplish her mission.
The vomit could be not because chunni stuff repulse her but because she seen MC die, possibly his death had to do with the paranormal, hence she wanting him to stop, and is likely related to the 2 other girls.
Witch is super interested in MC family jewels for some reason, but almost killed him, could have to do with the black tome he found.
Alien seem to have broke in to get to the PC too, my guess is she arrived late and is the one that healed MC injuries.
Big surprise from MC saying red was his love interest, he didn't simply knew about her already for her popularity.
There are 3 raw chapters up.