[boomboomsubban]

Not really true with a visual novel, where the only difference between two people playing is how quickly they read the text on screen.

[wahahah]

There are choices which set flags, decide character routes, and determine a multitude of endings.

Typically a full playthrough will try to get all endings, but won't get all of the subchoices that just affect flavour. https://vndb.org/v11/lengthvotes