koyuki (blue archive), noa (blue archive), rio (blue archive), toki (blue archive), yuuka (blue archive), blue archive, highres, 1girl, amai2d, black hair, black halo, black thighhighs, blurry, blurry background, book, book stack, bookshelf, breasts, bright pupils, chair, character doll, cosplay, doll, feet, from below, grabbing own hair, hair ornament, halo, hand in own hair, hand on chair, holding, holding own hair, koyuki (blue archive) (cosplay), large breasts, layered sleeves, long hair, looking at viewer, millennium science school logo, multicolored halo, noa (blue archive) (cosplay), red eyes, red halo, ringed eyes, sitting, solo, stuffed toy, sweater, thighhighs, toki (blue archive) (cosplay), turtleneck, turtleneck sweater, two-tone halo, wall shelf, white pupils, white sweater, yuuka (blue archive) (cosplay)