At first I thought it was about neglected siblings but then it got absurd. Really, child in adults body? Thinking like an adult? For me, it’s just didn’t make sense.
@Raystio I mean, anime/mangas don't make a lot of sense with their logic 99% of the time. Regardless it's hard to keep it straight when making a story unless you're a literal god.
Besides, the kid had a dream about the murderer's past, so wouldn't be too surprised if certain things come naturally that at his age he wouldn't normally do