Seven Seas Entertainment Ongoing Series

Inside the Tentacle Cave (2025)

SEEKING LIGHT IN DARKNESS!Fornelis, the strongest Beastfolk knight in the kingdom, and Meltia, the daughter of the Elven queen, have entered the forest shrine in search of the holy blade of the Hero...but become ensnared in the Black Ooze's demonic grasp. Helpless to aid her former friend's daughter, Fornelis can only watch in horror and frustration as she herself suffers horrendous torment. Meanwhile, Mariabel finally finds the holy sword, the only thing that can defeat the Black Ooze...but will the fiend lurking in the shadows allow her to seize the sacred treasure?

A RACE TO THE BLADE!As the diabolical, all-consuming Black Ooze ravishes the countryside, Lady Fornelis leads a group of warriors and refugees to reach the mighty Hero’s Sword in hopes of using it to conquer the slimy abomination. But can they reach the sacred blade before the slime? And who will be lost to the hungry, lustful monstrosity along the way?

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8
Issues
196
Pages/Issue
Ongoing
Frequency
Mature
Rating

Writer

Umetane

Artist

Abi

All Issues

Inside The Tentacle Cave (Manga) Volume. 8

Issue #8

$15.99

Inside The Tentacle Cave (Manga) Volume. 8

Release: October 27, 2026
Inside The Tentacle Cave (Manga) Volume. 7

Issue #7

$15.99

Inside The Tentacle Cave (Manga) Volume. 7

Release: April 14, 2026
Inside The Tentacle Cave (Manga) Volume. 6

Issue #6

$15.99

Inside The Tentacle Cave (Manga) Volume. 6

Release: November 25, 2025
Inside The Tentacle Cave (Manga) Volume. 5

Issue #5

$15.99

Inside The Tentacle Cave (Manga) Volume. 5

Release: August 12, 2025
Inside The Tentacle Cave (Manga) Volume. 4

Issue #4

$15.99

Inside The Tentacle Cave (Manga) Volume. 4

Release: January 21, 2025
Inside The Tentacle Cave (Manga) Volume. 3

Issue #3

$15.99

Inside The Tentacle Cave (Manga) Volume. 3

Release: August 13, 2024
Inside The Tentacle Cave (Manga) Volume. 2

Issue #2

$15.99

Inside The Tentacle Cave (Manga) Volume. 2

Release: March 19, 2024
Inside Tentacle Cave Graphic Novel Volume 01 (Mature)

Issue #1

$14.99

Inside Tentacle Cave Graphic Novel Volume 01 (Mature)

Release: October 31, 2023

Reading Order

  1. Inside Tentacle Cave Graphic Novel Volume 01 (Mature)

    A Mature-rated dark fantasy tale! Deep in the tunnels of an abandoned mine lurks a demon that absorbs the power of anything it touches: the Black Ooze. When it consumes its first human male, it acquires both intelligence and ravenous sexual desire, much to the distress of a sorceress who mistakenly enters its domain. The heroes who seek glory and riches in these caverns are about to learn why monsters should be feared!

  2. Inside The Tentacle Cave (Manga) Volume. 2

    FROM SEDUCTION TO SUBMISSION!Consuming adventurers and bending female mages to its will, the Black Ooze grows in both power and hunger. Frederica and Fiana, warped by demonic lust, hatch a plan to lure fresh bodies into the mines—and they’re on the verge of success! Is there any hope of escape for Satia and the other victims?!

  3. Inside The Tentacle Cave (Manga) Volume. 3

    AN INSATIABLE HORROR GROWS...Fiana and Arfila, Knights of the Queen’s Guard, barely escaped from the slime caverns with their sanity. Regrouping at the palace, they are determined to return to the caverns and slaughter every last one of the slimes who violated their allies. But townspeople have begun to go missing in the night. A new nightmare is being born. The Black Ooze’s reach is spreading beyond the confines of the mine, spelling doom for the Kingdom of Fontilles and its citizens.

  4. Inside The Tentacle Cave (Manga) Volume. 4

    A CITY IN RUINS.Our heroines think they have dealt with The Black Ooze once and for all, reducing it to ashes deep within the lascivious cave where it dwells. But the Ooze is smarter than it seems, sending tendrils below the kingdom’s sewers, feasting—and growing stronger and larger—on bodily fluids and waste, quietly biding its time for the perfect opportunity to strike.That time is now. Caught unawares, our heroines fall and the city now lies in ruins. The last line of defense is Queen Letitia, who just might be powerful enough to repel The Black Ooze. But will her hubris cost her her kingdom?

  5. Inside The Tentacle Cave (Manga) Volume. 5

    ECSTASY AND DESPAIRWith her kingdom lying in ruins, Queen Letitia is now the only defense left for her daughters against the cowardly Slimes. But her desperate last-ditch attempt at exterminating these (usually powerless) pests is for naught when the Slimes evolve into a creature far stronger than the most formidable mage! Will help ever arrive for the citizens of Fontilles? Or will they be trapped forever in this living nightmare?!

  6. Inside The Tentacle Cave (Manga) Volume. 6

    A RACE AGAINST SLIME!The kingdom of the elves has been consumed by the Black Ooze, Queen Leticia has been captured, and an army of evil slimes oozes its way into Gewalt, land of the beastmen. Within Gewalt rests the mighty Hero’s Sword that once banished the Demon King. Could it be the key to defeating the Black Ooze? Or will it be devoured by the coming monster horde?

  7. Inside The Tentacle Cave (Manga) Volume. 7

    A RACE TO THE BLADE!As the diabolical, all-consuming Black Ooze ravishes the countryside, Lady Fornelis leads a group of warriors and refugees to reach the mighty Hero’s Sword in hopes of using it to conquer the slimy abomination. But can they reach the sacred blade before the slime? And who will be lost to the hungry, lustful monstrosity along the way?

  8. Inside The Tentacle Cave (Manga) Volume. 8

    SEEKING LIGHT IN DARKNESS!Fornelis, the strongest Beastfolk knight in the kingdom, and Meltia, the daughter of the Elven queen, have entered the forest shrine in search of the holy blade of the Hero...but become ensnared in the Black Ooze's demonic grasp. Helpless to aid her former friend's daughter, Fornelis can only watch in horror and frustration as she herself suffers horrendous torment. Meanwhile, Mariabel finally finds the holy sword, the only thing that can defeat the Black Ooze...but will the fiend lurking in the shadows allow her to seize the sacred treasure?