Features Akari's mother, Hinata, before she died. (Original series: Day Break Illusion)

Features Senkuu's father, Byakuya, before he died. (Original series: Dr. Stone)

Features Goku's father, Bardock. (Original series: Dragon Ball)

Features the hero Avan in his youth. (Original series: Dragon Quest: The Adventure of Dai)

Features Mavis, Fairy Tail's very first guild master, in her youth. (Original series: Fairy Tail)

Features Suzuno, the Priestess of Byakko, long before the characters in the original manga were born. (Original series: Fushigi Yugi)

Features Suzuno, the Priestess of Byakko, long before the characters in the original manga were born. (Original series: Fushigi Yugi)

Features Takiko, the Priestess of Genbu, long before the characters in the original manga were born. (Original series: Fushigi Yugi)

Features Juda's parents when they were younger. (Original series: Remnant: Kemonohito Omegaverse)

Features Akame's ancestor, Hakutaka, who came to be known as "the first Akame". (Original series: Silver Fang)

Features Gin's father, Riki, when he was young. (Original series: Silver Fang)

Features Tsugumi's parents, Kuroji and Harutsugu, when they were young. (Original series: Megumi to Tsugumi)

Features Sinbad in his youth before he became the king of Sindria. (Original series: Magi)

Features Takanori Jingūji in his younger days before he became the head of the Japan Shogi Association. (Original series: March Comes in Like a Lion)

Features Yuuki Yuuna's ancient relative, Takashima Yuuna, and the other members of the very first Hero Team. (Original series: Yuuki Yuuna is a Hero)

Features Yuuki Yuuna's ancient relative, Takashima Yuuna, and the other members of the very first Hero Team. (Original series: Yuuki Yuuna is a Hero)

Features Ayeka and Sasami's father, Emperor Azusa, and Tenchi's grandfather, Yosho, when they were younger. (Original series: Tenchi Muyo! Ryo-Ohki)

Spinoff about Otomi Mayura's parents, Seigen Amawaka and Yukari Otomi. (Original series: Twin Star Exorcists)