The following entry has been pulled for not having enough context. Lolicon is getting misuse for anything other than the definition, so if it fits you can put it back with more context.
Would the numbered bibs count as a Chekhov's Gun? They're in plain sight at the start of the game. All of the children in the orphanage that accept Bumby's help have one except Alice. In the end, it is revealed to be a 'ranking' system for Bumby's child prostitution ring - Alice rejects Bumby's methods of forgetting the past and is not as easily brainwashed as the other children.