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.
You're so happy about it.
.أنت جد سعيد بشأن هذا
Mensch, wie sehr er sich freut!
Schatz, das war ein voller Erfolg!
No esperaba verlo tan contento.
Fue todo un éxito, cariño
No esperaba verlo tan contento.
Ha sido todo un éxito, papá.
Il est tellement content.
On a réussi, chéri !
Non pensavo ti rendesse così felice!
Não acredito que ficou tão feliz assim!
настолько обрадуется.
Мы угадали с подарком, папа.