Light, a human boy living in a world where humans are the weakest and most ridiculed race among nine, is invited to join the Concord of the Tribes, an elite adventurers group composed of members from all nine races. He is overjoyed to be included, believing he has finally found acceptance and purpose among his comrades. The group embarks on a mission to the Abyss, the largest and most dangerous dungeon in the realm, where they face increasingly difficult trials together.

During their descent into the Abyss, Light's party members begin to act suspiciously, whispering about "Maestros" and a hidden agenda. Light, preoccupied with surviving the dungeon's threats, does not fully grasp their meaning. When the group reaches a critical chamber, they lure Light into a teleport trap, claiming it is a shortcut to the next level. The trap activates, sending Light plummeting into the deepest, most lethal layer of the Abyss, where level 1000 monsters roam and survival is nearly impossible.

Surrounded by monstrous creatures and facing certain death, Light makes a desperate final pull on his Unlimited Gacha, a magical skill that has previously only produced useless junk items like bent forks and rotten apples. To his shock, the gacha produces Mei, a stunning Level 9999 warrior clad in a maid outfit, who effortlessly dispatches the surrounding monsters and saves Light's life. Mei pledges absolute loyalty to Light, explaining that she is bound to serve him as her summoner.

Over the next three years, Light uses his Unlimited Gacha to summon more Level 9999 warriors, each a beautiful and powerful woman with unique abilities and unwavering fealty to him. Together, they carve out a kingdom in the depths of the Abyss, constructing a fortress and establishing a thriving society among the dungeon's ruins. Light himself grows stronger, eventually reaching Level 9999 and becoming an Overlord capable of commanding his army of elite warriors.

With his new power and loyal companions, Light decides it is time to return to the surface and exact revenge on his former party members and the world that scorned him. He leads his army out of the Abyss, emerging dramatically at the site where he was betrayed. His former comrades, now celebrated heroes, are shocked to see him alive and vastly more powerful than before.

Light confronts each of his betrayers one by one, using his Level 9999 warriors to overpower them in battle. He reveals the truth about their betrayal and the hidden plot involving the Maestros, exposing their treachery to the world. As he dismantles their reputations and defeats them in combat, he declares his vengeance complete and asserts his new status as a force to be reckoned with.

Light's final act is to challenge the established order of the world, using his power and influence to dismantle the discrimination against humans and reshape society according to his vision. He stands atop his fortress in the Abyss, surrounded by his loyal warriors, as the world watches in awe and fear, knowing that the era of human weakness is over.

The ending of My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge! concludes with Light, now a powerful Level 9999 Overlord, successfully confronting and exacting revenge on his former party members who betrayed him. He ascends from the dungeon to the surface world, overcoming all obstacles and enemies, and secures his position as a dominant force, leaving his betrayers defeated and his own fate as a supreme adventurer sealed.

In a detailed, scene-by-scene narration of the ending:

The final arc opens with Light standing at the deepest part of the Abyss dungeon, where he had been left to die by his former companions. His body and spirit, hardened by two years and six months of survival, now wield the power of the Unlimited Gacha, granting him Level 9999 allies and abilities. The scene is tense, with Light's expression a mix of cold determination and simmering anger.

He begins his ascent from the dungeon's depths, each step marked by battles against monstrous guardians and traps designed to prevent escape. The animation highlights the overwhelming power Light commands, as his summoned allies--each at maximum level--tear through enemies with ease. The visuals emphasize the contrast between Light's newfound strength and the helplessness he once felt.

Upon reaching the surface, Light confronts his former party members one by one. The first encounter is with the leader who orchestrated the betrayal. The scene is charged with emotional intensity; Light's voice is steady but filled with the weight of betrayal as he recounts their treachery. The battle is swift but brutal, showcasing Light's mastery of his gifts and the loyalty of his summoned companions. The betrayer falls, defeated and broken.

Next, Light faces the remaining members. Each fight reveals more about their motivations and regrets, but Light remains resolute, his desire for revenge unshaken. The animation carefully depicts their desperation and fear contrasted with Light's calm and overwhelming power. The fights are interspersed with flashbacks to moments of camaraderie and betrayal, deepening the emotional impact.

As the last betrayer falls, Light stands alone, victorious but contemplative. The final scenes show him looking out over the world he once sought to protect but now plans to dominate. His allies gather around him, loyal and powerful, symbolizing his transformation from victim to overlord.

The closing moments focus on Light's internal state--his resolve to reshape the world according to his vision, free from the betrayal and discrimination he suffered. The ending theme "Shirogarasu" by Nowlu plays softly, underscoring the bittersweet nature of his victory.

Regarding the fates of main characters:

• Light emerges as the supreme Overlord, his revenge complete, poised to influence the world with his overwhelming power.
• Former party members who betrayed Light are defeated and left broken, their ambitions crushed by Light's retribution.
• Light's summoned Level 9999 allies remain loyal, standing by his side as his new family and force.

This ending closes the story arc of betrayal and revenge with a clear resolution: Light's transformation from a betrayed adventurer to a dominant overlord, having overcome all who wronged him and ready to face the world anew.

The TV show My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge! (2025) does not have any publicly confirmed or detailed information about a post-credit scene in the available official sources or promotional materials. None of the major anime news outlets, streaming platforms, or official trailers mention or show a post-credit scene for this series.

If a post-credit scene exists, it has not been documented or highlighted in the official summaries, trailers, or reviews released up to this point. Therefore, based on current information, there is no known post-credit scene for this anime.

Light's Unlimited Gacha gift allows him to summon level 9999 items and allies without apparent limits, making him overwhelmingly powerful compared to others. This ability is central to his strategy for revenge, as it enables him to build the strongest kingdom and gather formidable companions to confront and outmatch his former party members and enemies in the world.

Light's former party, known as the Concord of the Tribes, was composed of members from the nine races, including humans, who united to fight discrimination. However, they betrayed Light by attempting to kill him in the Abyss dungeon. Their motivations are tied to underlying racial tensions and personal ambitions, which led them to see Light as a liability or threat, resulting in their betrayal and abandonment of him to die.

After awakening the true power of his Unlimited Gacha, Light summons powerful allies who become instrumental in his quest for revenge. His relationships with these summoned companions deepen as they share battles and challenges, forming bonds of loyalty and trust. Key companions include characters like Mei, Nazuna, Aoyuki, and Ellie, who support Light emotionally and strategically, helping him build his kingdom and confront his enemies.

Post-escape, Light faces numerous challenges including hostile forces from his former party, discrimination against humans, and the political complexities of uniting diverse races. He overcomes these by leveraging his Unlimited Gacha to summon powerful allies and items, using strategic intelligence, and gradually gaining influence and respect. His kingdom grows stronger as he turns former enemies into allies or defeats them decisively.

The Abyss dungeon is not only the site of Light's betrayal but also a critical setting where he discovers the true extent of his Unlimited Gacha gift. It symbolizes the depths of despair and danger Light must overcome. The dungeon's harsh environment and threats serve as a crucible that forges Light's resolve and power, setting the stage for his transformation from a betrayed adventurer to a formidable force seeking revenge.

The TV show My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge! is not fully family friendly and may contain content potentially upsetting for children or sensitive viewers.

Potentially objectionable or upsetting aspects include:

• Betrayal and violence: The protagonist is betrayed and left to die in a dangerous dungeon, involving scenes of attempted murder and survival in a hostile environment.
• Dark fantasy themes: The story involves revenge, combat, and building an empire through summoning powerful warriors, which may include intense action and conflict.
• Mature emotional tones: Themes of betrayal, despair, and revenge are central, which might be emotionally heavy or disturbing for younger audiences.
• Fantasy violence: As a sword and sorcery anime, it likely contains battle scenes with weapons and magical combat.

No explicit spoilers are revealed here, but the overall tone and content suggest it is more suitable for teens and older viewers rather than young children or those sensitive to violence and dark themes.