Meet Kaito Takagi, your typical high schooler with a low profile. He spends his days exploring dungeons in Japan, hunting slimes for some extra cash. On the side, he quietly admires his childhood friend, the popular girl in class. One day, a rare golden slime shows up, and after Kaito defeats it, he finds a super valuable item—a card that can summon mythical beings! He decides to use it and summons a stunning warrior maiden. Now, Kaito has a chance to rise above his ordinary explorer life. Get ready for a modern fantasy story filled with battles!
Episodes
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.
The Second Servant Card
Kaito has achieved great success with his new servant and even dares to venture into the second level. However, it doesn't quite sit well with him that he cannot rely on his own strength.
The Viscount-Class Devil and Sylphy's Concerns
Kaito has found 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.
Hidden Dungeon
Kaito's now seeing diminishing returns on the experience he's getting from the monsters on floor 3, so he makes the decision to brave the floors beyond... totally unsuspecting of what he's about to find there.
Attempting the 7th Floor! And a Date?!
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! Meanwhile, on the surface, Haruka works up the nerve to ask Kaito... out shopping?
The Doubly Dangerous 8th Floor
Kaito tries to convince his servants to let him form a different group. His new partners have big goals as well, and he needs to prepare for them.
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. Can Kaito manage to take a hint about how Haruka's feelings on the dungeon, much less anything else?
Bellia the Knight-Class Devil
Kaito and the girls take on floor 9 for the first time, where they're in for one nasty surprise after another.
Joyful Days
Kaito and his friends join Airi at her family estate for a study session that takes a fun turn. Afterward, Kaito's party takes another stab at floor 9 and tests out the various new powers they've acquired to great success.
What I Can Do Now?
Kaito and his friends learn the truth about Hikari's condition.
Searching for the Elixir
Kaito pushes himself beyond his physical limits in order to find the elixir.
And Their Heroic Tale Begins
Kaito confesses to Haruka that he is afraid of going back into the dungeon. Haruka encourages him, and suddenly, Kaito gets an idea!
Top Cast
Kana Hanazawa
Sylphy (voice)
Yuya Hozumi
Kaito Takagi (voice)
Azumi Waki
Haruka Katsuragi (voice)
Mayu Sagara
Luceria (voice)
Yoshino Aoyama
Airi Jingūji (voice)
Saika Kitamori
Miku Moriyama (voice)
Ryotaro Okiayu
Berlia (big) (voice)
Akari Miyazaki
Berlia (small) (voice)
Natsu Shirosaki
Titania (voice)
