2girls =3 ahoge bangs black_hair blush brown_eyes commentary e6kou from_side hair_between_eyes hair_ornament hair_ribbon hairclip highres holding_hands labcoat long_hair long_sleeves multicolored_hair multiple_girls off_shoulder onii-chan_wa_oshimai! oversized_clothes oversized_shirt oyama_mahiro oyama_mihari pink_hair pout purple_hair red_ribbon red_shirt ribbon shirt short_sleeves siblings simple_background single_bare_shoulder sisters smile twintails two-tone_hair white_background