There's a doujin artist by the name of Goran no Sponsor (御乱ノ栖本佐) who has made a lot of what appear to be really-good peeing doujins. Unfortunately, none of them have been scanned. They are all on DMM, though. Could someone rip them and upload them to Sadpanda? They seem to be really good from what I've seen on some websites. For reference, some previews can be found at http://oshikko-gaman.club/gaman-manga/

And on a related note, could someone scan this doujin by another artist? (http://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_090636/peshi-003/) I can't find raws of it anywhere, not even in the usual places.