Made in Abyss: Dawn of the Deep Soul
The Abyss is an endless chasm in a world with nothing more to explore. Within the deep and giant pit dwell strange and wondrous creatures, and even deeper within lie ancient Relics long lost to the modern civilization. Fascinated by its mysteries, explorers have flocked to excavate this giant hole. Over time, these brave explorers came to be known as Cave Raiders. Riko is an orphan girl who lives in Orth, a city built circling the Abyss. She dreams of becoming a legendary Cave Raider and unearthing wondrous mysteries from the chasm, just like her mother once did. One day, a group of Cave Raiders excavate a White Whistle which belonged to Riko's mother. With its discovery, Riko decides to delve deep into the pit. By her side is Reg, a robot boy who has lost his memory. In the fourth layer of the hole, Riko is on the brink of death from the poison, but is saved by Nanachi who calls themselves a Hollow. Nanachi joins the party, and the trio delve deeper into the fifth layer of the chasm. Then, they stumble upon a girl named Prushka.