Once you hit 50 points you can forget about grinding more points. This is where the point grinding "sandbox" ends. All following events will unlock in sequence only by previous events, not by point scores. Try to make sure you haven't skipped some events, because the one you skipped might unlock your progress to new ones.
This is not a sandbox where you can visit the events you want and skip the others. This is an "obfuscated" VN where you have to find the path yourself. Even when you have 50 points already, but you have skipped an important event, you won't be able to progress. It's the events that unlock progress here, not the points.
You can cheat right at the beginning and give yourself 50 points to go at the start, but you won't be able to progress unless you visit required events. And too many points too early with a specific character may actually lock you out of some events you need to progress in specific sequence.
For example, there might be an event unlocked when you hit 30 points with a specific character, an event that you need to get to the next event that will unlock at 40 points. But you won't be able to get to the first event if you
already have 40 or more points, the first event disappears from the menu when you have too many points. Get it?
Which is why cheating actually works against you here. Without cheating the events will open in correct sequence and progress normally.
Pay special attention to new options in choice menus you haven't open before. One of them may lead you to following new events.
I don't remember much else.
The latest walkthrough might help a little.
https://attachments.f95zone.to/2021/01/1008620_DDanaWalk.txt
