2girls, blush, breasts, closed_eyes, collarbone, collared_shirt, greyscale, hair_between_eyes, hair_ornament, hairclip, hamu_(plot_sy), hug, jacket, large_breasts, long_hair, long_sleeves, mole, mole_under_mouth, monochrome, multiple_girls, open_clothes, open_jacket, open_mouth, shimizu_ai_(yankee_shimizu-san), shimizu_kei, shirt, shirt_tucked_in, siblings, sisters, smile, tonari_no_seki_no_yankee_shimizu-san_ga_kami_wo_kuroku_somete_kita, waist_hug