1boy 1girl age_regression aged_down alternate_universe arm_tattoo artist_name bamboo belt bit_gag black_hair black_pants blue_eyes blue_kimono blush carrying child child_carry cowboy_shot demon_slayer_uniform female_child flower-shaped_pupils gag gagged hair_pulled_back hakuji_(kimetsu_no_yaiba) highres holding_another's_finger jacket japanese_clothes jiuyu0 kimetsu_no_yaiba kimono koyuki_(kimetsu_no_yaiba) long_sleeves nihongami off_shoulder pants pink_kimono polka_dot polka_dot_kimono red_eyes short_hair simple_background sleeves_rolled_up symbol-shaped_pupils tattoo two-tone_kimono updo white_background white_jacket wide_sleeves