Kill Kill Kill Kill Kill
Why did Eiji help him? To find out, Migi disguises herself as Sally and visits Eiji's house. Eiji shows Sally (Migi) around the attic and tells her about Reiko's and Eiji's secret, and how it has put Hitori in danger. However, Reiko has also seen them talking! Migi recoils from Reiko's strange aura. At that moment, Migi witnesses Reiko's terrifying true nature.
Aired 27/11/2023EP 9 - Kill Kill Kill Kill Kill

Migi&Dali
After finally adopting a child, the Sonoyamas were unprepared for the mystery that would soon unravel. Hitori seems to be the perfect son for his loving parents. He's handsome, intelligent, and grateful for his new lavish life—but he has a dark secret. Hitori is actually the twins Migi and Dali pretending to be one boy. And they have a terrifying motive behind their hidden identity.
(Source: Crunchyroll)