Gumi Nijiiro, the idol who loves doing throat fucking and wants to get better at it, feeling it deeper in her throat! She arrives on a unicycle called "Gumi Jiston" from the distant "Gumi Land," a bright and energetic girl. At first, she was playfully trained with a custom gummy dildo made from her favorite gummy candy, expanding her throat. However, she gradually transitions to intense throat training that makes her vomit, culminating in a series of intense throat fucking with a giant cock, leaving her in tears. Her smile fades, and she's on the verge of a character breakdown as she endures this relentless torture!