Complex sentence: In the sequel "Episode of Miku", Aya gives birth to a girl named Miku and, three years later, a boy named Aki, who is the look-alike reincarnation of her late twin brother.
Split into simpler sentences: In the sequel, Aya gives birth to a girl named Miku. Three years later, she gives birth to a boy named Aki, who is the look-alike reincarnation of her late twin brother.