bang-you, kashiwagi azusa, kashiwagi chizuru, kizuato, 2girls, bikini, biting, blush, breast envy, breasts, brown eyes, brown hair, collarbone, crying, embarrassed, flying sweatdrops, gloom (expression), hairband, handkerchief, holding, jealous, large breasts, long hair, lowleg, lowleg bikini, motion lines, mouth hold, multiple girls, nipples, nose blush, one-piece tan, panties, shiny skin, short hair, siblings, side-tie panties, sisters, sweat, sweatdrop, swimsuit, tan, tanline, topless female, underwear