Where did you find these images? Some of them are not visible on the artists PIXIV? Did you get them all from his fanbox? SO does the artist not provide any PNG images on his fanbox?

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Yes this is definitely from fanbox. Cropped out versions of some of these are on the pixiv page.

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Anyway, people should support his fanbox. It is extremely cheap and he constantly makes new content.
Unlike many other artists his English is also good enough that you can have a conversation with him,
Unlike many other artists he always reply to people. If you like wrestling or ryona then I suggest that
you should pay for his fanbox account. He always listens to his supporters and often draw their suggestions.

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