Any build in guide?

[Mëowed]

Does this game have built in guide/ pure story mode that let me enjoy all endings and contents without needing to figure out the options myself?

[ēdiššu]

no, it's up to you to find them, but there's a guide describing requirements;

yes, in main menu there is a tab with list of endings; from there you can choose to play a particular one when you unlock it; this tab exists because only six of them are in the base game, rest are bundled in dlc-s;

[jprc2]

There is also a small but very useful DLC with in-game tips, helping you when you have a screen with multi-choices. So you know when your choice can stop your path with a lady, or help it...
I have the 3 dlcs for the 3 parts, and it proved very useful.