@MoonStoneX maybe shes into incest but she doesnt know its not a regular fetish? haha idk man i have seen so many mangas where a girl goes ''ur like a brother to me!'' and then get mad or disappointed when the MC doesnt act on their advances.
Edit: after re-readign ch1 i remembered the theory that the MC's sister loves him too and purin said she doesnt want to marry him to not break their friendship and the other theory about the ''Witch'' that cursed the sister and blessed Purin, posing as Purin and saying those things to the mc
Purine can fuck off with that BULLSHIT, fucking says she see's him as a brother than gets mad when he doesn't kiss her smfh, I fucking hate dumb mind games like that when it comes to romance like FFS make up your fucking mind!!!
@MangaKeks in case the assassin would be surprised cause this is the first time he met someone sincere with proper greeting and respect, thus they feel bad about it and lost motivation to do his job