Your friend Sayori recently invited you to the Literature Club at your school! Looks like you've got a harem! Hopefully you like crazy girls.

Classic DDLC setup. The girls are all faithful recreations with accurate personalities. They're defined to my personal liking down to their writing styles and personal preferences.

This can go in a fluffy direction, or it can be tense and dramatic, depending on how you play it. The only way to "solve" the situation is to navigate the politics of satisfying all four girls. This is doable, but it takes a steady hand to keep things from devolving into chaos. Good luck!