saiwai hiroshi, serizawa hiroko (cybernetic hi-school), dennou gakuen, gainax, 1girl, animal ears, blush, bow, bowtie, breast lift, breasts, brown hair, bunny day, bunny gold day, closed eyes, detached collar, fake animal ears, glasses, gold bow, gold bowtie, large breasts, leotard, looking at viewer, nipple piercing, nipples, nude, open mouth, piercing, pixel art, playboy bunny, rabbit ears, short hair, sky, smile, space, sparkle, standing, star (sky), starry sky, teeth, upper body