Exorcist Boy: Guardian Bg

Question: What is between black and white? (On leave, updates will be irregular, irregular, and irregular from May 25 to August 25, and will be officially returned after August 25) Exorcist boy Ya Lian and others ("Gray Boy" "D. Gray-man") (Original male protagonist Aaron Walker x original female protagonist Seth Marianne) Seth - artificial apostle, second-generation exorcist, all-round player, brain short-circuit scientist, assistant Allen - the fourteenth player, parasitic exorcist, little angel, output Elements include but are not limited to (childhood sweethearts, black humor, 19th century European style, humanoid weapons, fantasy) A slow-burning, growth-oriented protagonist, Ya Lian appears slowly, slowly, slowly (Chapter 19) Ya Lian randomly hands out candy after appearing. The reason why it's so slow is because the heroine has to be introduced and some small foreshadowing. The heroine is two years older than Bialien. The plot timeline roughly follows the original work. This article begins four years before Allen was accepted as a disciple by Kuros. It is not a funny story, but it is not sadistic. At least there is absolutely no emotional line. I tried my best to pull up the progress bar, but the logic is not rigorous enough and the level is limited. All changes are required for plot development. Newbies and new works, please bear with me. The first release is a bit rough and will be refined after completion. (This article is purely fictional, please do not make it seem like reality.)