2girls, air bubble, asahina mafuyu, asphyxiation, black cardigan, blue eyes, blue jacket, blue shorts, bubble, cardigan, drowning, grey skirt, high ponytail, jacket, long hair, long sleeves, miyamasuzaka girls' academy school uniform, multiple girls, neckerchief, project sekai, purple hair, red neckerchief, sailor collar, school uniform, shinonome neko-tarou, shorts, sidelocks, sinking, skirt, track jacket, underwater, upside-down, very long hair, white hair, white sailor collar, yoisaki kanade, yoru ni kakeru, yuri