rule 34 1boy armband arms behind back ass ass to ass back to back bangs bare shoulders bisexual black legwear black sailor collar blonde hair blue eyes bondage both sexes in same situation bottomless bound bound ankles bound together bound wrists bow breasts brother and sister cage collar duo feet feet together female femsub flat chest full body gag gagged gay grey legwear groin hair ornament hair ribbon hairband hairbow headphones highres improvised gag kagamine len kagamine rin leash leg warmers legband male male and female subs malesub merunyaa midriff multiple subs nail polish naked shirt navel neckerchief necktie no pants no shoes number tattoo numbered patreon patreon username pixiv pixiv username restrained ribbon sailor collar sex toy shirt short hair short sleeves siblings signature sleeveless sleeveless shirt small breasts stirrup legwear straight tape tape gag taped mouth tattoo testicles toeless legwear toenail polish toenails toes twins vibrator vocaloid white hairband white shirt yaoi yellow nails yellow neckwear 3107538