4girls, d, ^_^, asakura_toru, bangs_pinned_back, bare_arms, bare_shoulders, blush_stickers, breasts, closed_eyes, forehead, fukumaru_koito, greyscale, hair_bun, hands_on_another's_shoulders, higuchi_madoka, ichikawa_hinana, idolmaster, idolmaster_shiny_colors, misaki_nonaka, monochrome, multiple_girls, noctchill_(idolmaster), one-piece_swimsuit, parted_bangs, simple_background, sketch, small_breasts, smile, swimsuit, white_background