Wait why was implied cunnilingus removed? Hoshi's head is not low enough for a horn job, but more importantly you can actually see her horn. It's slightly under Ch'en's right knee.
Edit: I just saw the Pixiv comments on this art, someone asks "用角?不疼吗", asking if the horn is being used and if it hurts. The most recent comment on the art is by the artist, "用的舌头啦", they're saying it's with tongue. I see someone else already re-added the "implied cunnilingus tag", I don't think it should be removed again.