That seems like a candy truck. Maybe they want the opinion of Kakeru on some "new brand candy" and because they were late to their job, they "had to get him quick"?
While that ending certainly is sudden, I think I realize what they're setting up.
A situation where a lolicon (Rin) is going to be doing battle against an actual child predator. That's actually a scenario I've wanted to see for a while in anime/manga.
Kidnapper doesn’t know what they just got themselves into. Lol next episode either rin or kakaru is going to put a beat down on them lol. Plus can’t wait to see more about where they said his chromosomes were changing and what will the side effects in his life be?