Spent some hours over the past days debugging his code. The project is very messy - myFirstComplexApp type of messy; but I guess it was to be expected since he is not a programmer professionally. Most bugs come from an exaggerated number of variables being used and then tracked over many interaction - he forgot to reset them or that they can be changed in other places. There is also some weird RPGMaker event triggering problem that I could not quite figure out.
The good part is that, from what I can tell, there are some bugs cause by empty else actions. So he is leaving it open for future extension. All in all, I think the code could be cleaned in a month if he does only that.
Some bugs found:
1) Laura Pharmacy bug - event did not trigger. Could be an RPGMaker issue but I moved it directly to the char and it worked
2) Laura shower scene - 2nd part of the scene is on another map entirely

. Probably meant to have some variation in the future but did not trigger properly as implemented
3) Recess sex scenes with classmates - Rachel's variable for this was never reset so you would only ever get her scene
4) Jet house visit - it required affection with her that is not possible in the current build
5) Sarah butt plug scene - similar to 1)
I did not look into others - probably along the same lines