Migi and Dali have been fully accepted as members of the Sonoyama family.
They behave just like real parent and child, but the twins notice that Mom and Dad are acting somewhat distant.
Suspecting that the Sonoyama couple might be hiding something, the two discreetly begin to search the house and stumble upon an unexpected secret of the couple.

Migi and Dali are shocked, wondering if they have been deceived. However, determined not to let things end this way, they execute a plan to retaliate against the Sonoyamas.
The reason we came here as adoptees
والسبب الذي جاء بنا إلى هنا كمُتبنيين
Wir wurden hier zu Pflegekindern,
um den Täter zu finden.
Dejamos que nos adoptaran
para buscar al culpable.
Dejamos que nos adoptaran
para buscar al culpable.
Si on s’est fait adopter,
Ci siamo fatti adottare per entrare in città
Nós nos infiltramos
como filhos adotados
Мы дали себя усыновить,
чтобы найти настоящего преступника.