The story alternates between two worlds. One is the outside world, ruined 15 years after a collapse. Guided by the clue "the outside is like heaven," the reliable bodyguard Kiruko and the boy Maru press on through a dangerous journey.
The other is a facility surrounded by high walls — an inner world where children like Tokio and Mimihime live peacefully, ignorant of the outside. But an unsettling message, "Do you want to go to heaven?," casts a shadow over their days.
Airing from April 2023, produced by Production I.G with music by Kensuke Ushio. Praised for its meticulous worldbuilding and mystery, it swept five wins at the Anime Trending Awards 2023. 🕊️
📝 Highlights & Appeal Light spoilers
01① The Beauty of Two Interwoven Worlds
The ruined outside world and the walled facility — the way two utterly different stories gradually connect is stunning. The joy of solving the puzzle is irresistible.
02② A Meticulous, Unpredictable Mystery
Scattered foreshadowing and mysteries keep stoking the urge to theorize. The "what on earth is going on?" feeling is dangerously addictive.
03③ Reliable Kiruko and the Boy Maru's Journey
The odd-couple journey of Kiruko and Maru, and how their relationship changes, is captivating. As a buddy story surviving a dangerous world, it's superb too.
04④ Stunning Animation and Art
Production I.G's art of a ruined world and its tense action are magnificent. The way it renders the beauty and unease of ruins is exquisite.
05⑤ The Terror of the Monsters
The grotesque monsters that appear in the outside world keep the story constantly tense. Encounters with the unknowable threat are thrilling.
06⑥ Immersive Music by Kensuke Ushio
The music by Kensuke Ushio (A Silent Voice) elevates the world to its limit. Its distinctive sound design lets you fully immerse in the story.
07⑦ Weighty, Mature Themes
Deep themes like life and death, and what happiness means, run beneath the surface. It has a depth that goes far beyond a simple adventure romp.
08⑧ Worldwide Critical Acclaim
A powerhouse that won five awards including Anime of the Year at the Anime Trending Awards 2023. A masterpiece praised by critics and fans worldwide.
💡 Key Points & Predictions Some spoilers
Ahead, Kiruko and Maru meet all kinds of people and monsters on their journey, drawing ever closer to the true nature of "heaven." Meanwhile, inside the walled facility, the unsettling truth beneath the peaceful days is gradually laid bare. Where and how will the two seemingly separate stories intersect? The shock of the scattered foreshadowing clicking into place is a must-see. Around the true meaning of life, death, and the word "heaven," the story moves in unpredictable directions. 🕊️
🧾 Story So Far Contains spoilers
In a ruined world 15 years after a collapse, the bodyguard Kiruko and the boy Maru travel on, guided by the clue "the outside world is like heaven." Along the way they encounter grotesque monsters that attack people and survivors scraping by in the wasteland. Meanwhile, in a facility ringed by high walls, children like Tokio and Mimihime live unaware of the outside — until a cryptic message, "Do you want to go to heaven?," begins to shadow their peaceful days. Clues linking the two worlds — such as Maru's face resembling a certain person in the facility — gradually surface.
✅ Recommended Viewing Points
Highly recommended for anyone who wants an unpredictable, meticulous mystery and a weighty world worth theorizing about. Fans of settings where mystery and unease coexist, like The Promised Neverland or Made in Abyss, will be especially hooked. The brilliance of two stories converging, Production I.G's beautiful animation, Kensuke Ushio's music — all fuse at a high level in this mature masterpiece. Once you watch, you can't stop wondering how it ends: an SF mystery that demands to be binged. 🕊️
👀 Trivia & Fun Facts
💫 Unresolved Foreshadowing Contains spoilers
- What exactly is "heaven" — the true nature of the place the people of the outside world seek.
- Why the walled facility was built, and who the children really are.
- The meaning of Maru's face resembling a certain person in the facility, and the link between the two worlds.
- The event that collapsed the world, and the reason the man-attacking monsters were born.
💌 Predicted Viral Quotes for Next Season
— The signpost of the journey, a phrase that runs through the whole story.
"Do you want to go to heaven?"
— The cryptic message that shadows the facility's peaceful days.
"If you stay alive, good things happen."
— A line expressing an earnest, warm will to survive a harsh world.