it doesn't
the typical danganronpa crowd of freaks has been playing this shit nonstop for the last few weeks and having experienced over 70% of the game i can tell you exactly what is going on with it
it starts out with a semi-promising beginner route and then opens up a flowchart that leads into a ton of different options, except the vast majority of those options have basically zero consequence and maybe one or two plot threads you will find throughout them, as well as a bunch of pointless bad endings that give you zero information and are just hard cuts which are sometimes played off as jokes
so far out of ~10 routes (each with their own array of bad endings along the way and most of which go all the way to day 100) 2-3 of them have been worthwhile and the rest could have been an email, they're so fucking contrived and have so much repetitive combat it's unbelievable, especially the one route that's nothing but battles in a row and ends on two useless endings that do absolutely zero for your enjoyment or understanding
if you dare play this boring piece of shit you should absolutely ask people for a list of recommended routes instead of trying to do them all, so many are wastes of 10+ hours