For now, do you have any questions you want to ask to refresh your memory or fill in any blanks if you didn't read the manga? Also if you need any help thinking of what kinds of monsters you'd want to use, I do know a site that has a lot of info about various monster legends (although slightly adapted for Harry Potterverse, but you can readapt some of their details for this setting) and I wouldn't mind linking it for you to peruse for ideas