Rule 34 Dev - anal anal_sex bed blue_eyes blue_sans_penis blue_sans_tongue blush bone brothers comic dialogue gay heart incest kissing lizheru_(artist) lying male meta_request papyrus_au penetration penis sans sans_au sans_blush sans_eye sans_glowing_eye sans_penis sans_tongue sitting skeleton sweat tears text tongue underswap undertale_au yaoi|2252824152