2boys, aether_(genshin_impact), ahoge, aqua_background, aqua_hair, arm_tattoo, black_hair, blonde_hair, blush, earrings, facial_mark, fins, forehead_mark, genshin_impact, hair_down, head_fins, jewelry, koko_dono, long_hair, looking_at_another, male_focus, merman, monster_boy, monsterification, multicolored_hair, multiple_boys, shirt, short_hair, sleeveless, sleeveless_shirt, tattoo, white_shirt, xiao_(genshin_impact), yaoi, yellow_eyes