Chicka-Ляp Lyaap

A dark-haired girl with a red scarf is tightly hugged from behind by a blonde girl in a school uniform, her face contorted in a scream as bubbles float around them in a room with shoji screens. The scene cuts to a close-up of a bare thigh, then to a pink-haired girl in a school uniform looking down, followed by a close-up of the blonde girl smiling, then the pink-haired girl running with a glowing aura, and finally the dark-haired girl falling into water with a frog on her shoulder.