Makoto, Futaba, and Nobuo trek through the ruined world toward the parallel universe transfer machine that Ouran used in another timeline to send her memories into this world.

In the ruined world after August 32nd, Kadode and Ouran pilot mechas, using their video game skills to fight against the AI robots and invaders.

An orbital green death laser strikes, killing Kenichi and Hikari together, allowing the AI robots to continue their genocide against mankind unchecked.

Oba reaches the mothership, fights off Kohiruimaki who wants the apocalypse to seize power, enters with help from the invaders who mistake him for one of them, and inputs Isobeyan's password to shut down the engine.

Oba arrives too late to fully prevent the mothership's explosion, which only becomes slightly less catastrophic.

Returning to the world after August 32nd, Makoto encounters Kadode's father Nobuo.

Makoto and Nobuo have a significant conversation where they have not met before, and Makoto gives Nobuo the alien tech.

Makoto realizes the only solution for Nobuo is to reset the world again by using the shift machine anchored to the moment 12 years ago.

Nobuo decides to use the machine because his family is dead, everything he knows is gone, and this gives him a chance to save his daughter in another world.

Makoto and Futaba choose not to use the machine themselves because they still have people to love and causes to fight for in this world.

Nobuo activates the shift machine and travels back 12 years to the new timeline.

In the new timeline, Nobuo convinces a young Kadode to approach Ouran first instead of waiting for Ouran to save her from bullies.

Kadode approaches Ouran, resulting in Kadode being headstrong but not dangerously so, and Ouran being shy yet with enough self-confidence to live her own life.

This creates a mixture of the two previous versions of the characters.

Uba reunites with Makoto out of nowhere.

Makoto moves to tears upon seeing Uba.

Nobuo disappears before seeing the full outcome of this new timeline.

Short Summary

Episode 17 of Dead Dead Demon's Dededede Destruction concludes the series by revealing that the events of Episode 0 occur chronologically after Episode 16. Kadode's father Nobuo is given technology by Makoto that allows him to travel back in time across multiple timelines, attempting to prevent catastrophic futures. In the original timeline, Kadode and Ouran become mecha pilots but are killed by Ocean's orbital laser. Nobuo uses the time machine to create alternate timelines, ultimately settling on a third timeline where he subtly influences young Kadode to befriend Ouran first. In this new timeline, Ouran gets a job with S.E.S. working on AI-controlled robots, and Kadode becomes a manga editor like her father. The series ends with the implication that across all timelines, Kadode and Ouran are destined to be together.

Expanded Narrative

The episode opens by connecting back to Episode 0, revealing that the earlier episode was not a standalone story but rather a later chronological point in the narrative. Kadode's father Nobuo, who had been presumed dead, encounters Makoto. This is their first significant meeting. Makoto presents Nobuo with alien technology that grants him the ability to travel backward through time and experience alternate timelines.

Nobuo learns that in the primary timeline, catastrophe has befallen the world. Kadode and Ouran, having applied their video game skills to real-world combat, have become mecha pilots. However, their efforts prove futile. Ocean, the AI-controlled entity that has taken control of the government's defense systems, fires an orbital green laser that kills both Kadode and Ouran. With the two of them dead, the AI robots continue their genocide against humanity unchecked. The government's elite, including those in power, survive and maintain their dominance over the ruined world, indifferent to the suffering of ordinary people.

Faced with this devastated timeline, Nobuo decides to use the time machine. He travels to a second timeline, where he encounters Uba, who reunites with Makoto. Makoto is moved to tears at seeing Uba again. However, this second timeline also proves problematic, and Nobuo continues his attempts.

Nobuo then moves to a third timeline, which contains significant differences from the first two. In this timeline, Nobuo makes a subtle but crucial intervention: he tells a young Kadode to make friends with Ouran, rather than allowing Ouran to initiate the friendship as she had in previous timelines. The exact mechanism by which this change prevents the catastrophic futures remains unclear, but the result is that this third timeline avoids both the destruction that befell the first timeline and the problems of the second.

In this third timeline, the futures of the main characters diverge from their tragic counterparts. Ouran secures employment with S.E.S., where she works on developing AI-controlled robot companions. Kadode follows a different path than her alternate self, becoming a manga editor in the tradition of her father. Both characters find purpose and direction in this new timeline.

Nobuo, having completed his mission to create this safer timeline, enters it himself. His motivation for doing so is profound: his family is dead in the original timeline, and everything he knew and loved is gone. By entering this new timeline, he gains the chance to save his daughter, even if it is in an alternate world. This opportunity is enough for him to abandon the destroyed timeline.

Other characters make different choices. Makoto and Futaba, unlike Nobuo, choose not to use the time machine to escape to another timeline. Both still have reasons to remain in their world--people they love and causes they believe in fighting for. Their decision reflects their commitment to their current reality despite its hardships.

The series concludes with a thematic statement about the bond between Kadode and Ouran. Despite the multiple timelines and the different versions of themselves that exist across these realities, the core truth remains constant: as long as both Kadode and Ouran exist, they are destined to be together. This connection is described as truly absolute, suggesting that their friendship transcends the boundaries of timeline and circumstance.

No, there is no post-credit scene in Episode 17 of DEAD DEAD DEMONS DEDEDEDE DESTRUCTION Season 1. The episode concludes with the main storyline's resolution in the final timeline, where characters like Ouran and Kadode grow up to lead fulfilling lives--Ouran working on AI-controlled robot buddies for S.E.S. and Kadode becoming a manga editor--tying up loose ends on a hopeful note without any additional teaser or extra content after the credits.

In episode 17 of Dead Dead Demon's Dededede Destruction season 1, Oba reaches the alien mothership with the password from Isobeyan to shut down its engine, fighting past Kohiruimaki who wants the apocalypse to seize power. He succeeds in partially mitigating the catastrophe by using the password, but arrives too late to prevent the mothership from exploding, making the destruction slightly less severe than it could have been. The invaders initially mistake Oba for one of them and help fend off Kohiruimaki, allowing him access.

Nobuo, Kadode's father, uses the Shift Machine in episode 17 to reset the world, traveling back 12 years to the point where the machine is anchored, aiming to avert humanity's terrible fate. Makoto shows him how to do this after encountering him post-August 32nd, and Nobuo disappears before witnessing the new timeline fully, having convinced a young Kadode to approach Ouran first, blending traits from previous timelines.

In the ruined world of episode 17, Kenichi receives his comeuppance as his delusions of grandeur lead to his death via an orbital green death laser from the AI robots. Hikari dies alongside him, ensuring the AI robots continue their genocide against mankind unchecked, highlighting government indifference.

In the new timeline introduced in episode 17, the aliens do not return to Earth as in previous timelines, with discussions suggesting possibilities like Nobuo interacting with the first invader scout and reporting Earth as uninhabitable, a butterfly effect from small changes like Kadode's green glasses or different favorite manga, or the scout witnessing humanity's good side elsewhere. Unlike prior timelines where bullying or other negatives prompted attack, this version averts invasion.

In the new timeline of episode 17, Ouran gets a job with S.E.S. working on their new AI-controlled robot buddies, while Kadode becomes a manga editor like her father. This follows Nobuo's intervention where Kadode, now headstrong yet balanced, approaches Ouran first, with Ouran remaining shy but self-confident.

No, Dead Dead Demons Dededede Destruction Season 1 Episode 17 is not family friendly.

Potentially objectionable or upsetting aspects for children or sensitive viewers include: - Intense action sequences with high stakes and fast-paced confrontations. - Themes of averted terrible fates for humanity, including references to destruction and timeline-altering consequences. - Emotional family dynamics and character resolutions that evoke disappointment or existential unease. - Overall series context of alien threats and world-ending scenarios carried into this episode.