1girl bangs bat_background bikini black_legwear black_wings blue_hair blush breasts ca_ba_ya_ki cover cover_page demon_horns demon_tail demon_wings doujin_cover elbow_gloves frilled_gloves frills from_below gloves groin horns long_hair looking_at_viewer love_live! love_live!_school_idol_project micro_bikini midriff navel o-ring o-ring_bikini open_mouth pink_bikini skindentation small_breasts smile solo sonoda_umi swimsuit tail thighhighs wings yellow_eyes