He was a sinner. She was a saint. He was her irrefutable joy. She was his ultimate pain. He was her unknown cure. She was his worsening disease. He was pulling her down to hell. She was letting him.

What happens when the girl you once rejected in high school is now someone you can't take your eyes off? The famous vocalist Ruki from the Japanese band The GazettE and the insignificant Rin get tangled in a love triangle that no one but Ruki knows how to solve.