In the popular erotic image series "The 17 Forbidden Rules," idol Yui Sakiyama—known for her surprisingly former career as a bank employee—takes the spotlight. Despite her innocent and pure appearance, she is subjected to intense scenes involving bondage, suspension, and physical torment. One particularly striking moment features her using her fingers to scoop out foreign substances that have dripped onto her buttocks, creating a powerful visual impact that delivers a shocking experience not only to fans but to a wide audience.