This is a vacuum fellatio concept where the character's lips is puckered during a blowjob trained by the artist Sahara Wataru. Human/humanoid characters will work best. Furry characters will work fine, but it might lose the artstyle look depending on how strong the lora is. You can increase the weight by .1 - .2 if you want it to resemble the artist's style a bit more. Put "text, word box, kanji, speech bubble, word box, white bar, white bar censor" in the negative prompts so none of those start generating randomly

Positive Prompts: VFSW, 1girl, solo focus, sex, side view, disembodied penis, blowjob, fellatio, sucking dick, vacuum fellatio, face focus, close-up, face only, puckered lips