Trying to find a story

Mar 16, 2018
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#1
It''s about a gut who lived in a apartment block where the toilets go down and a girl comes to use his and it doesn't work but found his invention which was a human toilet she uses him but he can't speak and her sister uses him too? It's kinda forced after he gets in the box as he realises it was a mistake.

Any help that would be decent.