Summer Time Machine Blues

In a university in Kagawa Prefecture, the sci‑fi club and the photography club share a busy, cluttered space that hints at curiosity and camaraderie. The day begins with their different passions weaving together a shared memory of campus life.

The sci‑fi crew tosses a casual game of baseball while Yui Ito quietly photographs the moment. Their playful banter foregrounds the blend of youth and creativity, a memory that feels ripe for something stranger to intrude.

After the game, the group heads to a bathhouse where Haruka Shibata and Yui Ito develop photos together. A petty dispute over missing Vidal Sassoon shampoo stirs up a small storm, hinting at tensions simmering beneath ordinary life.

Takuma Komoto quietly buys tickets for a sci‑fi film and asks Haruka out, hoping to deepen their connection. Haruka misreads his intentions, thinking he already has a girlfriend, leaving him uncertainly standing in the doorway.

Friends push boundaries with a prank that escalates into a request to dance naked, puncturing the room’s playful mood. Coca‑Cola spills onto the air‑conditioning remote, and the group hands the broken device to their adviser Hoze for repair.

The following day, Haruka and Yui resume developing photos when a shadowy figure lurks in a corner and a time machine sits in the room. The discovery shifts the mood from mischief to a possibility that time itself might be bendable.

The group experiments by placing Atsushi Soga on the device, and to their shock it actually works. He travels back to August 19, revealing that he is the figure the photography club spotted earlier.

Soga’s journey lands him in a swampy 1906 town where locals mistake him for a Kappa, entwining ancient folklore with the evolving science‑fiction tale.

Daigo Ishimatsu, Kotaro Hozumi, and Shunsuke Koizumi travel back to yesterday to steal the remote and stop it from breaking in the present. Once there, curiosity eclipses intention, and they abandon their mission to explore the past instead.

Tamura, a sci‑fi club member who traveled from August 20, 2030, is drawn into the group’s tour of the past as they seek to understand the time machine. He does not know where the device came from, but the others decide to guide him through what lies in the past.

Hoze explains the chilling consequence: changing the past can trigger a grandfather paradox and threaten the entire universe. The team grasps the gravity of their actions and commits to guarding history.

Tamura’s forward journey reveals a familial link when a camera hints at his connection to Haruka. Yui Ito and Haruka deduce that Tamura is Haruka’s future son, weaving a mythic thread through time. The discovery nudges Kohtaro Hozumi toward pursuing his own time‑travel project and prompts Haruka to agree to a real date with Komoto.