Tsukasa was playing the Musical Eden game.He had played this game so often, trying to unlock all the endings and reach out to all the characters, that he was tired.Tsukasa was about to turn off the game when he suddenly heard the voice of Rui's character.

"Tsukasa, wait!"

The sound came from the headphones.Tsukasa froze, and then felt his body weaken, and lost consciousness.Tsukasa woke up in the room where Rui was sitting...He had just entered a computer game.