1girl, armpits, arms_up, bikini, breasts, dated, day, fate/grand_order, fate_(series), genjou92, headphones, headphones_around_neck, medium_breasts, multicolored_hair, navel, outdoors, sei_shounagon_(fate), sei_shounagon_(swimsuit_berserker)_(fate), signature, solo, stretching, swimsuit, twintails, underboob, yellow_eyes