This artist has two active Pixiv accounts listed, each apparently associated with a different set of other URLs. Is this just an odd mix up, or is there a connection here I'm missing?
After some research, it looks like two different artists. The Pixiv account with the account name "hiyohiyo" belongs to a different artist, but probably got lumped in with hiyohiyo due to that name. I've separated that artist's (who goes by the flattering handle shota_ochinko) posts.