ninai, firefly (honkai: star rail), honkai: star rail, honkai (series), highres, 1girl, bare legs, bench, black-framed eyewear, black hairband, black panties, breasts, bug, butterfly, censored, feet, female masturbation, fingering, glass, grabbing own breast, gradient hair, grey hair, hairband, insect, long sleeves, masturbation, multicolored hair, nipples, no bra, on bench, panties, park, park bench, pussy, ribbon, skirt, spread legs, underwear, wooden bench