Go to https://mofumofutranslationblog.wordpress.com/ and ask Emon You can apply to be a translation checker/translator for Assassins Pride and will receive the raws for the LN. Otherwise buy it or go to some shady places on the net.
There is no ongoing TL up to date with the manga, that I know of. Web novel, perhaps, but light novel is either bought or if you're luck and desperate enough, you might find it illegally somewhere in the web. The story is good, especially the premise of having the *spoilers* kill the *spoilers*, because of the *spoilers* *spoilers*.
i can't wait for the anime release, but honestly my japanese language not very good (only can read hiragana, katakana, few of kanji, adj, verbs etc.)