sachiko shirayuki, koharu (blue archive), blue archive, highres, 1girl, alternate costume, black wings, blush, book, embarrassed, english text, expressive wings, feathered wings, full-face blush, grey background, halo, head wings, holding, holding book, long sleeves, looking at viewer, low wings, mixed-language text, pink hair, simple background, slit pupils, solo, steaming body, sweat, twintails, wings