For those fellow friends who doesnt know how to do the routes here how it goes
Basically each time you get to choose which one to visit - Hiyori Aya Rio Machika and Koharu
If you want to end up in their routes just focus on the 1st one you chose
There is a 6th route and that route is a harem route
Spoiler!
For those who hate domination i do not recommend Machika´s route she totally dominates his brother so good luck surviving the pain