Holy hell, I get some of you are lazy, but this was answered two posts above yours, and there's multiple ways to do it.
You can even google this. -____-'
Mentioned a few posts before yours. If you've progressed enough and gone back to the cave in the beginning (when everyone in Topa's mentioning a loud noise coming from there),
then you should get an event which unlocks the nighttime visits.
Sorry, to be clear, TL for you is translation? And are you referring to the Scripts file, or just script as a generic term.
I used Translator ++ to tweak the Scripts file, which apparently broke a TON of stuff that I and others are just fixing now.
If you're referring to the game's script (dialogue), it's more or less the same, but I added 'flavor' to it to make it more interesting at points, or to help the player along, since parts of the game aren't exactly intuitive.
Errr ... if you rescued Charlotte, you've beaten about a quarter of the game, lol. Your next step is to visit the pirate's lair and then the elven village.
Each heroine gets affection points when choosing them for events, which unlock subsequent events with them.
You can do whatever you want (it's an RPG). Dunno why you're asking if you explicitly say that you've already made up your mind though.
And it's called HAREM fantasy, so I'd recommend raising up everyone, which is possible, in order to get the best ending.
Of course, if you like monogamy or a particular girl, focus on her (but you'd be better off playing another game then).
If you're asking, you didn't actually beat the FULL game.