Two female college students, 'Kokomi' and 'Meru,' arrived at a hot spring inn deep in the mountains for their graduation trip. It is said that nearby there is a love power spot called the 'Waterfall of Happiness.' However, this trip was meticulously planned as a revenge trip by Meru, Kokomi's jealous friend. Unbeknownst to Kokomi, even the innkeeper was in cahoots with Meru. She was suddenly drugged with an aphrodisiac and subjected to various forms of perverted training such as bondage sex, restraint humiliation play, and gang●, all of which were filmed by Meru. In the end, she was penetrated by multiple penises in front of her friend...
