1girl absurdres backpack bag bangs bare_arms bare_legs black_hair blue_archive blue_one-piece_swimsuit braid braided_bun butterfly_hair_ornament butterfly_tattoo collarbone contrapposto covered_navel cowboy_shot double_bun flat_chest grey_eyes hair_bun hair_ornament halo head_tilt heart highres kisaki_(blue_archive) kkato long_hair one-piece_swimsuit open_mouth randoseru red_bag school_swimsuit sidelocks simple_background solo standing swimsuit tattoo thigh_gap twintails very_long_hair wavy_mouth white_background