Idk it has been 11 years i though the last volume really "the last" but the new volume basically like reset button so the progress back to 0% it's like completely new story so i can't give you a date. This manga even has only 1 chapter/2month update. Just read it already it's really worth it.
like i really wanna read this but not while it's on going. does anyone know how many chapters it's left until it's completed?(⊙…⊙ )