Episode 12

A Battle I Can't Lose is the twelfth episode of The Hidden Dungeon Only I Can Enter (Anime). It was aired on March 27, 2021 on the Animeism block on MBS, TBS, BS-TBS, and AT-X, with Crunchyroll streaming the series.

Synopsis
Why is Olivia so close to Noir? It involved an event that happened during the adventurer era. On the other hand, Noir is desperately cornered by Olivia Clone. Can he find a breakthrough!?

Plot
The episode begins where the last one ends, with Noir attacking, but being defeated by Olivia Clone. Then the episode goes back 200 years in past, with Olivia being asked by a boy to be his master, but she doesn't accept and go away. During the following days, the boy still bothers Olivia, that after hearing the reason he desires to be her apprentice, tests and rejects him, telling him to give up.

The boys still insists, and Olivia began to teach him a few lessons, like how to kill a Iron Goblin, and while she still declines his requests, she began to change her mind. One day Olivia is informed that that boy passed away, protecting a little girl from a Iron Goblin. Mourning she never taught nor gave him any skill, Olivia is later trapped in the Unending Dungeon, until she was found by Noir, who resembles that same boy from 200 years ago.

Back to the present, Noir is saved by Emma, who brings Lola, Luna and Leila to help. Even being cured, Noir still can't help as one by one, the girls are defeated by Olivia Clone, although he helps Leila break Olivia Clone's Sword.

Noir tries to fight Olivia Clone again, but he discovers that she edited his skills. Desesperante, he sacrifices all his skills except his unique ones, but he still can hurt Olivia Clone, that gets mad and beats him. When she is ready to give the final blow, Noir, sacrificing almost all his LP, attacks Olivia Clone and cuts her in half, revealing her true form, as a bunch of chains, before she disintegrates. Tired, the girls helps Noir recover his LP by touching him with their breasts.

Noir comes back to the Unending Dungeon, but Olivia isn't there. He find her, freed, outside the dungeon, and they finally hugs each other, while Olivia toys with Noir. In Stardians Rarities, the new fruits they are selling, made by Dory, are a success, while a new semester in Hero Academy begins. Leila trains Noir in martial arts in the park, but Lola sees it and, thinks she's helping him gain LP, hugs his arm, followed by Luna, who thinks the same. Emma comes in, and jealous, gives a French kiss on Noir in front of them, while Alice, completely mad with what see saws, prepares herself to attack them with large sword.

The episode ends in the Unending Dungeon, where Olivia asks Noir if he recovered his skills. He says he recovered most of them, but he isn't in a hurry. Olivia informs him that the pathway to the 16th Floor is now open after Olivia Clone's death, and that although she doesn't know how many floors the Dungeon have, if he gets to the 100th, he might becomes as strong as her. Noir them prepares himself to explore again the Dungeon, opening it's gates as the episode ends.

Appearances

 * Noir Stardia
 * Emma Brightness
 * Lola Metrose
 * Luna Heela
 * Leila Overlock
 * Olivia Servant
 * Alice Stardia
 * "Boy"
 * Death Chains: Olivia Clone
 * Father of Noir
 * Dory
 * Elna Stongs
 * Tigerson (Cameo)
 * Mother of Noir (Cameo)
 * Mira Santaje (Cameo)
 * S-Class Students (Cameo)
 * Maria Fianna Albert (Cameo)
 * Amane (Cameo)
 * Lenore Bludon (Cameo)
 * Hjorth Boyle (Cameo)
 * Kent Proix (Cameo)
 * Allen Milanos (Cameo)

Monsters

 * Iron Goblin (Mentioned)

Locations

 * Royal Capital
 * Stardians Rarities
 * Hero Academy
 * Park
 * The Unending Dungeon
 * 2nd Floor
 * 7th Floor

Skills

 * Sacrifice
 * Lightning-Cloaked
 * Run Like the Wind
 * Energizing Shot
 * Healing Shot
 * Demon Fist
 * Wind Slash
 * Superhuman Strength
 * Editor
 * Fire Dragon Strike
 * Bestow
 * Temperature + 5
 * Sacrifice
 * LP Conversion

Items

 * Olivia Clone's Sword
 * Father of Noir's Sword
 * Two-edged Blade

Trivia

 * It adapts the web novel chapters 142, the light novel Extra chapters Olivia's Apprentice and Happiness in Both Hands and manga chapters 14, 37 and 38.