Twin boys Migi and Dali are adopted by a wealthy and kind elderly couple, the Sonoyamas, not as themselves but as a single boy named "Hitori Sonoyama," and while concealing their true identities, they plan to win over the Sonoyamas.
Migi and Dali become part of the Sonoyama family, but when they suspect that the Sonoyamas are hiding something, they investigate and uncover an unexpected secret, leading them to decide on a plan to fight back Mr. and Mrs. Sonoyama.
Seeking answers about their mother's death, the twins start taking concrete steps, recalling childhood memories of a special room, and they decide to join the Boy Scouts as a means to befriend someone who might help them.
Migi and Dali find a clue about the Ichijo family's room with a daphne pattern, and to befriend Eiji Ichijo, they enroll in school, but unexpectedly, Migi falls in love with a girl at the library.
Shocked to discover that Sali's true identity was Dali, Migi flees to Akiyama's house to escape. Dali comes to bring Migi back for revenge, but Migi decides to live freely, not bound by revenge.
Reiko has been cornered by Migi and Dali and she tells the story of their mother Metry, which also reveals the truth about the twins' birth. After sharing everything, Reiko attempts to take Eiji back and attacks Migi and Dali.
