I like revenge stories and this is one of them. But to put it simply, a flaw of this manga appears to be pacing. 50 chapters in and the MC has not taken any revenge on anyone yet, in fact he has yet to even see his classmates, part of the charm of revenge stories is well... the revenge parts. I have no clue how many more chapters it will be until things finally get going, Likewise the entire first arc, finding Erika to translate text, was a dead end. The Characters are fine. Touka, the MC, is pretty standard and refreshingly acts mature and humanabout romance with the main elf Heroine, Seras. Their early interactions are stiff and weak with a lot of "I shall be your sword" over and over and formalities, but they warm up to each other and it gets better. Likewise things are more fun when Eve joins. Eve has a fun design to her and her own story/motivations. Seras is decent and has a lovely kindness.

Here's to hoping it wont be years before the revenge part starts