td (tandeom97), seia (blue archive), seia (swimsuit) (blue archive), blue archive, highres, 1girl, arm behind head, arm up, blonde hair, closed mouth, covered navel, cross halo, dot nose, drink, expressionless, from above, halo, holding, holding removed eyewear, jacket, long hair, looking at viewer, lying, official alternate costume, official alternate hairstyle, on back, one-piece swimsuit, one eye closed, side ponytail, solo, swimsuit, unworn eyewear, visor cap, white one-piece swimsuit, yellow halo, yellow jacket