Migi to Dali

Migi to Dali (ミギとダリ, Migi to Dari, "Migi and Dali", sometimes romanized as "Migi and Dali") is an anime series based on the Manga of the same name.

Synopsis
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.

Season 1

 * 1) Migi and Dali
 * 2) Welcome party
 * 3) Let's make friends
 * 4) Untitled
 * 5) Water Flea's Song

Voice Cast

 * Migi - Shun Horie
 * Dali - Ayumu Murase