[Marushamo] Shrunk and taken home inside her mouth

A confident schoolgirl beckons a tiny man, declaring she will swallow him whole unless he can make her ejaculate, turning a simple game of tag into a deadly contest. She forces his shrinking body into her mouth, taunting his panicked cries as he becomes a helpless prisoner inside her oral cavity. The story ends with her gleeful declaration that his new home is forever within her teeth, leaving him to endure her loud, crushing voice.