We must now proceed with paizuri, as the Force wills it.

Original Gallery: http://e-hentai.fbk.tokyo/index/g/1563169/fb2f108f8f/

Additional Links:
https://ouo.io/3o6LTo
https://www.pixiv.net/users/6486425
http://huzeugirl.booth.pm/
http://www.melonbooks.co.jp/detail/detail.php?product_id=590204
http://ec.toranoana.jp/tora_r/ec/item/040030795478

The title this time is a pun around うがい手洗い (gargling and hand-washing) an unsurprisingly terrible children's song aimed at teaching them proper hygiene (and boosting mouthwash sales).