Lee Tae-joon, who is attending Mirai Arts College, has a girlfriend named Yuna, who is called the goddess of the school. After dating her for a long time, he felt bored of the simple relationship and wanted a new stimulus. Eventually, he suggested a threesome to Yuna, but when he saw her frightened and angry, he began to become even more curious about the genre. Then one day, he learns about NTR in a magazine called Supark and opens his eyes to a new world…