3boys, aged_up, arm_grab, black_background, blank_eyes, brothers, dark, dual_persona, green_hoodie, heart, heart_in_mouth, hood, hoodie, looking_at_another, male_focus, matsuno_choromatsu, matsuno_osomatsu, multiple_boys, osomatsu-kun, osomatsu-san, out_of_frame, penguin_haro, petite, siblings, spiked_hair, time_paradox, twins