it'll be interesting if they have a 'normal visit' and drink tea together but if he didn't want his identity known that's prolly an issue or maybe she used to be part of their 'group'
or like some plot twist where they're 'good guys' and using her to get rid of the criminals/assassination attempts lol. based on the art section the author was able to extend it into 5 volumes so i imagine there would be at least one flashback