If "no Mori" is the key part of the title, you might be thinking of this one-shot shojo manga by Yuki Midorikawa.
| Theme | How It’s Explored | Representative Scenes | |-------|-------------------|------------------------| | | Haruto’s mourning of his mother parallels Kiri’s “time‑drift” (loss of memory). | Episode 3 : Haruto draws the sea while Kiri watches a sunset that never ends. | | Technology vs. Humanity | The New‑Century Children embody the conflict between engineered progress and organic life. | Chapter 7 : Debate between Dr. Akiyama and Mayor Takahashi on the ethics of Project Dawn. | | Temporal Perception | Chrono‑Nexus creates moments where characters experience “paused” time, prompting introspection. | LN 3, p. 156 : Haruto experiences a 5‑minute conversation stretched into an hour. | | Community & Isolation | The “overnight stay” motif emphasizes how brief shared moments can forge lasting bonds. | Manga Vol. 5 : Townfolk gather for a night of lantern‑lighting, each sharing a secret. | | Identity & Free Will | Kiri’s struggle to define himself beyond his designed purpose. | Final Episode : Kiri decides to keep the Chrono‑Nexus or give it up. | shinseki no ko to o tomori work