NHDTA-517 Her older sister is conducting an experiment! "If you keep your dick inserted for 10 hours, a woman's entire body becomes an erogenous zone, apparently."

A school boy who puts her to sleep with sleeping pills and attacks her older sister. The shock of being raped by her sister's boyfriend is short-lived, and the school boys' friends who come to her house for her sister's body. The sensitivity soars while enduring various shames such as "cooking", "going out to throw away garbage", "going out to home delivery" etc. And after 10 hours, he himself shakes his waist and devours Ji Po.