Kaito is a high school student working as an ordinary explorer in the dungeons of Japan. While hunting slimes, he finds a golden slime he’s never seen before. It drops a rare servant card that summons a powerful valkyrie of otherworldly beauty!
EPISODE 1
This Nobody Will Become a Hero
Kaito is a frail boy who hunts slimes on the uppermost level of the city's dungeon; one day, he finds and defeats a glowing slime that leaves behind a very special card, changing Kaito's life forever.
EPISODE 2
The Second Servant Card
Kaito has achieved great success with his new servant and even dares to venture into the second level; it doesn't quite sit well with him that he cannot rely on his own strength.
EPISODE 3
The Viscount-Class Devil and Sylphy's Concerns
Kaito finds a new servant card and this time it's a demoness; her bold and demanding nature surprises him and seems to meet resistance from Sylphy.
EPISODE 4
Hidden Dungeon
Kaito decides to take part in a dungeon event to get to know some other explorers, but he's going to have a hard time explaining that to his usual party; on the surface, Haruka works up the nerve to ask Kaito out for shopping.
EPISODE 6
The Doubly Dangerous 8th Floor
Kaito tries to convince his servants to let him form a different group; his new partners have big goals and he needs to prepare for them.
EPISODE 7
Open Campus of Adolescence
Kaito takes Haruka to an open campus event at Ouka Academy, where they meet up with Airi and the rest of her party.
Yuya Hozumi
Azumi Waki
Kana Hanazawa
Mayu Sagara
Yoshino Aoyama
Saika Kitamori
Azusa Tsujimori
Tomoki Kobayashi
Kazuyuki Fudeyasu
