2018 abs anthro arno biceps black_skin blue_eyes brothers brown_fur brown_hair celio cetacean chapter_3 clothed clothing comic dialogue english_text feline fur group group_sex hair humanoid_penis male mammal marine multicolored_fur multicolored_skin muscular muscular_male night orca page_33 page_number pecs penis peritian sex siamese sibling size_difference tan_fur text threesome twins two_tone_fur two_tone_skin vein whale white_skin yaoi