2boys, aged_down, air_bubble, artist_name, barnacle, black_hair, black_sailor_collar, blue_background, blue_hair, blue_scales, blue_skin, brothers, bubble, colored_sclera, colored_skin, crossdressing, eel_boy, fins, floyd_leech, full_body, glowing, glowing_eyes, green_background, green_eyes, green_sclera, head_fins, heterochromia, holding_hands, jade_leech, looking_at_viewer, male_focus, monster_boy, multicolored_hair, multiple_boys, open_mouth, sailor_collar, scales, school_uniform, serafuku, sharp_teeth, shinonome2nd, short_hair, siblings, signature, smile, streaked_hair, teeth, twins, twisted_wonderland, underwater, white_serafuku, yellow_eyes