A little bit, the game itself gives u a limit of 180 turns(totally not possible to edit through Cheat Engine) while u can pretty much mod any visible value, AP when levelling up is shared by all characters, u can modify their stats making it easier to advance when playing, some events only happen when u get to turn x then pass some turns ahead and checks again, however it's mostly dungeon advancement entirelly on battles(simulation similar to Sengoku Rance) where u have some choices here and there that may affect the ending and also, the relationship with the girls that also have their own individual ending(or so). U can close to the end of the game like... totally accept an contract with a demon lord and become a half-demon around, but well, this is a sample. Mostly, events are far and u have enough time within the 180 turns to finish it with ease, but cheat engine does wonders when u just want to mess around. Game can end when a character comes to you and say they found the dragon within a dungeon behind the demon king castle, well, finish it... game over. And that's it. It may happen in any turn as long as u finish about 4 of the other dungeons or so...
Basically, all girls are actually willing to go vanilla with you, however there are some who at first refuse to travel along with u and u know, bad things may happen, the warrior u meet at the beginning(forgot her name, but feels a lot like the usual Dragon Quest pattern ones) she refuses to join ur team offer, however u can find her again in the desert being raped by the bandits or something like this after losing a battle, save her and she joins u. Well, rape isn't from the mc side though.