pichipan pichi t's doji can't keep the big sister of dom's

My older sister has recently become so fat that she can't wear pants. He asks his brother for help, but a squeaky brother's mischief is set on fire and he puts his hand in his sister's pants and moves his fingers. Gradually escalating from this, the younger brother scolded his majestic and dull sister for a dormitory play such as "Let's irritate to be small face", "Let's shake our hips with a horseback riding position to make a cub", "Let us normalize to train our abdominal muscles" and "Let's drink samen to make our skin smoother".