A young woman named Lin, a clarinetist in a well-known orchestra, embarks on her journey to master anal sex over the course of 30 days. As she progresses, she evolves into a monstrous anal beast, relishing in the sensations provided by both large dildos and massive cocks. Her cries echo through the room, accompanied by pink walls vibrating in sync with her pleasure. She enjoys being choked during intercourse and ultimately reaches climax after her three holes are stretched wide open. Despite wearing a mask to protect her identity, her incredible ass speaks volumes about her talents.