Hello!~>I Finish it within 1 hour only thanks to the cheat it's little kinda grindy for love points in my opinion it's a little bit crumbles of pieces in content.
~>Without the grindy love points and items I would say 20-30min depends how fast u can read and understand the story.
~>If you want to ask is it worth to play yes because of the story not the sex part if you love story rather than beat ur meat.
Are... you really sure you finished it? I mean... I can reach the end of the prologue in 30 min skipping every text, with cheats and knowing exactly what to do on every occasion (Only because I lost all my saves). But... that's like ultra mega fast, it seems impossible to finish it within 1 hour if you read all the text.
Even, I can safely say there's only one event that (timed and reading fast) has a 15/20 min length.
The game finishes whenever almost everyone reaches level 10, you go to the bed, press "finish prologue", you see another large af event, and then a window appears with a "prologue finished" text. Did you reach that?