Everything about the manga begins with the world of Lelouch

The first love of the protagonist in the comic book world. The world she lives in does not rely on playing cards, but fights through contracted elves. Bo Yu once traveled to her world and developed feelings for her. However, during an elf rampage incident, Bo Yu chose to sacrifice himself in order to save her. Because he was unwilling to accept the news of Bo Yu's death, he indulged in the illusion he created. In order to awaken Asuka, Bo Yu chose to use part of his soul to retrieve her memory in her illusion with piano music. However, in the illusion, Bo Yu saw another side of Asuka that was unwilling to wake up. The other side of Asuka was even more unwilling to wake up after discovering that the illusion was the real Bo Yu. In the end, she chose to wake up after being persuaded by Bo Yu. When Asuka woke up, she found that Bo Yu's completely unconscious soul had turned into a contract spirit to guard her. She always believed that Bo Yu would meet her again. Until a game...