What is the meaning of war? Conan, who has been fighting for many years, has never been able to understand. What he wants is so simple, to be with his lover Haibara Ai and his best friend Mori Kakiri for the rest of his life, but why God is unwilling to satisfy him with such a simple need. The flames of war have burned around Conan and the three of them, dragging them into the whirlpool of war.
Ten years later, on the roof of a building in Shinjuku, Tokyo, a grenade knocked down Ai Haihara, causing her to fall from the 18th floor. Conan opened his hand to catch her without even thinking, and Mori Katsumi followed closely behind, and the three of them hugged each other tightly.
Conan opened his eyes wide, trying to find a glimmer of hope in the desperate situation. Perhaps out of God's mercy, a huge hole that could not be explained by modern science appeared under Conan and the three of them, sucking them in.
When he opened his eyes again, Conan found that the three of them had come to a strange world, and they had turned into children!
How will the three Conan people live as children? Facing a strange world, how should they familiarize themselves with the rules here? After experiencing the taste of peace, are they really still willing to find their way home?
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