The full game is not free - however I think they said the full version will be cheaper if you pick any tier on the Kickstarter with the game key (don't quote me on this). And if the KS isn't funded there will be no foreseeable English translation.
The Ilyes Route does exist, but won't be coming out until 2021. The student routes come in 2020. (This split is to give the devs more time to complete the Fenrir and Ilyes routes and give us some content early).