My older sister has recently gained so much weight that she can't wear pants. She asks her brother for support, but her lewd brother's mischief ignites, and he puts his hand in her sister's pants and moves her fingers. From here, the younger brother, who gradually escalates, deceives the serious and naive older sister, saying, "Let's irama to make a small face", "Let's shake the hips in cowgirl position to make a neck", "Let's do missionary position to train the abdominal muscles". "Let's drink semen to make the skin smooth" and so on.
