@Esor If I had to guess, it'd be to the end of the Saint-Monster Confrontation arc. Seeing the Founder's Festival would be nice, but I feel like that would require them to leave out even more than they did in the first season
@Esor There's a fan translation of volumes 6 through 11 that's actually pretty well done if you're unable to buy the official translations (official translations are only up to vol 10 right now). Seems like the translator behind it has taken an indefinite hiatus, however. Someone has used machine translation (specifically DeepL) to translate volumes 12 through 17 and it is very rough, but still plenty to understand the plot.
Not sure what MangaDex's policy is on links so I won't post them, but just look up "Tensura Fan" for the good translation and it should be the top result.
@_tomoe_
Thanks for your recommendation. I'm patient enough to wait till someone on youtube make explanation about them. I'm lazy enough to read it myself.
The one and only LN i have read is OreGairu Shin contains the story after anime (Maybe u need to read it too. I highly recommend)