He did fuck all of them in the novel...
...but on the other hand the ending is really bad.
Hopefully they'll change it for the manga since they already changed stuff.
He's fucked literally every single girl in the web novel/light novel
Almost all the umas are for (You)
the only exceptions are taabo (is a retard that doesn't know what love is), helios (is a retard and gay for ruby), and shakur (an autist)