I can't recall, it's around volume 8-10, I think.
You actually might read the LN. The WN is kinda raw and messy, so there's a lot of changes that've been made in LN.
And the manga use the LN version.
Season 2 of the show is in Volune 5 so I'm thinking this is 6 or 7 if that.
as of ch 118 it covered LN vol 9 ch 4. you can read the LN on tesurafan
*tensurafan
If you want good writing, definitely LN. But if you can't handle the suspense, WN is just fine. It may not be as neat as the LN, but Tensura WN will always have a special place in my heart.
Around what chapter in the novel are we currently on? Also, which version should I read? The LN or the WN?