2boys, age_difference, bad_twitter_id, big_hero_6, black_hair, brothers, closed_eyes, fur_collar, grey_shirt, hand_on_another's_face, hand_on_another's_head, hands_on_another's_cheeks, hands_on_another's_face, hiro_hamada, incest, kiss, kissing_cheek, long_sleeves, male_focus, multiple_boys, one_eye_closed, onii-shota, shiogochi, shirt, short_hair, shota, siblings, simple_background, smile, tadashi_hamada, yaoi