kai xin, serina (blue archive), blue archive, absurdres, commentary, highres, symbol-only commentary, 1girl, :d, arms behind back, artist name, bag, black bow, black bowtie, black skirt, blush, boots, bow, bowtie, bridge, brown bag, brown boots, cardigan, dark, full body, half-closed eyes, halo, heart, medium hair, miniskirt, night, open mouth, pantyhose, pink hair, pleated skirt, sailor collar, shoulder bag, skirt, smile, solo, standing, tree, white cardigan, white pantyhose, white sailor collar, yellow halo