No, they didn't. The idea of game is seeing a bunch of characters (up to 50) and experience all the scenarios with them.I'm not really interested in starting over multiple times, I just want 1 playthrough...tbh this is pretty annoying why the hell didnt the dev just put everything under 1 narrative...
Generally visual novel style games require you to restart runs to see the content, it's nothing really new here.
If you want an approximately complete game without seeing 100% of everything, you can focus on completing all the achievements, maybe.