Originally Posted by Unregistered

Can you please explain what you mean by scrolling your mouse during the boss fights? I wasn't aware that scrolling did anything

Just keep scrolling up/down with mouse during attack animations, it works amazingly.

Regarding the event, it is the best one I've seen, being able to max out the event girl on the first day easily.
Also a relief after monotropastrum where I almost failed getting all dress/skill blooms.