Mōretsu Mask was known as the beautiful hero who fought to protect her students, but her one weakness was slimy snails. When Principal Satan discovered this secret, she was forced to face off against a creepy snail monster teacher lurking beneath the school. The slippery, wet sensation rendered her unable to even activate her ultimate attack, the "Mōretsu Attack." Captured by the principal and locked inside the snail's nest, she was assaulted by a giant, slimy snail that crawled all over her body, licking and slithering across her skin. Overwhelmed by the terrifying yet intensely pleasurable sensations, her mind and body gradually broke down. Her mask dissolved and peeled away from the snail's corrosive saliva, exposing her true identity. Mōretsu Mask became completely enslaved by the slippery snail, ultimately decaying into ruin… [BAD END]