To Your Eternity Season 3 Episode 21: Stay Here

The episode opens with fragmented memories, ghosts of Fushi's past. We see Fushi in his child form, holding a distraught Yukie. Then, a younger Yukie receives his iconic green hoodie, a symbol of newfound connection. The Beholder's voice questions the removal of the knocker from Yukie, offering the single word, "Coexist." These fleeting images culminate in Yukie's poignant request for Fushi to be there when his life ends, a promise Fushi implicitly accepts, yet still struggles with. The Beholder observes that Fushi "can't reach a decision."

The scene shifts to a school classroom, where Mizuha contemplates her future, considering an elite high school far away. Kasabe, her friend, expresses anxiety about his own direction, a familiar teenage predicament. Tomari attempts to motivate him, but her advice about "getting his shit together" leads to a rather unexpected revelation: Kasabe's urgent need to finish his "Occult Newspaper." Hiiragi joins the enthusiasm, rallying the "Occult Research Club" to action.

Alone, Fushi wrestles with a monumental choice: should he fully inherit The Black One's abilities or remain as he is? He acknowledges the clear advantages of the power, yet a deep, unnamed anxiety troubles him. Seeking counsel, he turns to Miran, the horse, attempting to give her a series of food-related names like Tofu or Mochi. Miran's comical rejection of his suggestions, culminating in a kick, highlights Fushi's current state of mental distraction and uncertainty.

Fushi finds a paper airplane, a creation of The Black One, lying lifelessly on the grass. He questions its stillness, asking if it is "dead." This triggers a flashback to a pivotal conversation where Fushi, enraged, accuses The Black One of failing to create immortal beings, lamenting the deaths of those like Pioran. The Black One, with unsettling calm, challenges Fushi to "create life" himself, to build "a world with no death, no suffering."

Inspired, Fushi declares his newfound resolve: to become a human capable of bringing everyone back to life. His friends, Kasabe, Hiiragi, Mizuha, and Tomari, rally around him, believing their "Occult Research Club" can achieve this extraordinary feat through their newspaper. Even The Beholder, initially wry, agrees to assist, expressing a desire to "collect data about humans." Fushi's friends smile, ready for this impossible, hopeful journey.

As a golden, compass-like object glows on screen, The Beholder's voice shifts perspective. He speaks directly to the audience, declaring that this will be "the story of a certain human who changed the world through the Knocker." This short monologue serves as a bridge, hinting at profound future events and framing the next sequences as a glimpse into what is to come.

The narrative jumps forward, showing Fushi in a new human form, Nonno, wearing a blue hoodie and a question mark mask. She demonstrates her powers, extending her arm to playfully lift Kasabe, for an online audience. Hayase, Fushi in another form, and The Beholder, in a younger guise, observe her. They discuss the challenges of adapting to modern life and finding purpose, with Hayase admitting he's "still searching." The mention of Miran and a naming compromise subtly ties this future back to Fushi's earlier reflections.

In a domestic scene, the resurrected March and Pioran cause joyful chaos, playfully roughhousing with a toy octopus. Hayase and The Beholder look on with exasperation, caught in the children's boisterous energy. Fushi, in another form, is seen calmly serving them, a picture of quiet contentment amidst the lively household. The scene emphasizes a family-like dynamic, one Fushi has created.

Tomari expresses concern for Nonno (Fushi), who is about to leave the house. Nonno, rushing out, forgets her key and then stumbles down the stairs, injuring her hand. Despite the injury, she quickly reassures Tomari that she is "fine," displaying a resilience that surprises Tomari. Tomari is left holding the forgotten key, a symbol of Nonno's youthful impulsiveness and perhaps her hidden nature.

The "Occult Research Club," including Hiiragi and Kasabe, discuss Nonno's online presence. Hiiragi suggests a "face reveal" to gain credibility, prompting shock from Kasabe. Yuki, Fushi in a male form, strongly objects, emphasizing the need to protect Nonno's secret from those in her life who do not know she is a knocker. The debate underscores the delicate balance Fushi maintains between his public persona and his true identity.

Nonno declares her intention to appear online "exactly like this," mask and all, and that she doesn't mind if her friends like Sumika find out. She yearns for acceptance of her true self, tired of "deceiving people." This resolve leads to a dramatic confrontation with Sumika, who discovers Nonno's secret. A tearful apology from Nonno and a comforting embrace from Sumika follow, showing a difficult but ultimately positive reconciliation.

Nonno begins her live stream, cheerily introducing herself. She holds up her question mark mask, then confidently removes it, revealing her face to the world. She proclaims her identity as "Nonno the Knocker," directly challenging the historical perception of her kind as enemies. With Hayase and The Beholder watching, she advocates for coexistence, stating that they have "learned from the people around us that we can be just like humans."

Nonno's friends, Kasabe, Yuki, Hiiragi, Mizuha, and Tomari, watch her stream with a mix of awe and support. Kasabe excitedly declares his love and admiration. The others chime in with their unwavering support, expressing happiness and a desire for continued friendship. Nonno, touched, expresses her gratitude.

Nonno smiles contentedly, remarking that "Things are fine as they are." She shares a joyful moment with Hayase in the back of a moving truck, crossing a bridge. As the truck disappears into the distance, Fushi's voiceover confirms his ultimate decision: "In the end, I never took on the Black One's powers." This final statement provides closure to his earlier internal conflict, revealing the path he chose.