The artist had to delete his old galleries on Pixiv, due to the guidelines and uploaded them now in new Collection.

Finally got around to browsing KEYLUN's Gallery to find the cover uncensored. Found it and uploaded it again.
Thanks to KEYLUN for uploading Manico's complete past here before he had to delete most of it. Unfortunately the cover in the Mega Link was broken, so I could only use the censored version.
KEYLUN's Gallery:
http://e-hentai.fbk.tokyo/index/g/2449074/ebfd794b11/

Here is the Pixiv link to the collection:
https://www.pixiv.net/en/artworks/104523608

The artist says that all his works are free and freely available, but if you still want to give him a little support:
https://ouo.io/3iqU2v