Abandon
In the trash is a weird looking fruit. Someone decided to abandon it here.
Most people abandon fruit when it's misshapen. It's probably fine though...
き
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You reach into the trash, take out the abandoned fruit, and bite into it. OUCH! There's a key (き) inside, and you just bit into it.
You abandon the fruit and stare intently at this key. It must be why the fruit was weird looking and abandoned in the trash... but what does it go to?! You dig through the trash and try the key on everything that's been abandoned in there.