https://archiveofourown.org/works/64818655/chapters/166579585
That's for the first novel, for the second novel of this is "Nameless Star" you can go on the Scribd website and sign up for a free trial, download the second novel, and then cancel the subscription and read the novel in your downloaded files.
Do ypu know in which chapter we are?
https://www.chereads.com/novel/31853510100668105/86002635856989260
I'm so sorry actually use this site since it's better to read on, it's where we are at in the manga as well. I'm really sorry about the mix up.
If you still want to read it on ao3 it's on the third chapter of the site and you'll scroll until you hit the bolded 3.2 Contrabass Solo and then some more because the 3.3 chapter isn't bolded.
Does anyone have the novel link