What's that smell?
In Chapter 1, interact/flush the toilets in the WC.

Everything else should be covered in the video.

To change language, choose the third option from the main menu, then select English on the next page.

Cutscenes are skipped, but I recommend watching them yourself.

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For my other guides, they are here:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2880052179