Summer Time Machine Blues (2005) Timeline Explained – Every Event in Order

The time machine appeared after Coca-Cola was accidentally spilled onto the air-conditioning remote, causing a short-circuit. The resulting surge created a portal that led to a time machine appearing in the overheated clubroom the next day.

Foreshadowing: Earlier, the group had been messing around with the AC remote while drinking soda, setting up the spill.

• time machine creation
• coca cola
• ac remote
• short circuit

Komoto had bought tickets to a sci-fi movie and planned to ask Haruka out, but he failed to communicate his intentions clearly. His friends played a prank on him, acting evasive about his whereabouts and insisting he dance naked, which created confusion. Haruka misinterpreted his awkward behavior as evidence he was already in a relationship.

Foreshadowing: The prank involving the naked dance routine was orchestrated specifically to humiliate Komoto, contributing to the misunderstanding.

• haruka
• komoto
• misunderstanding
• girlfriend
• romantic plot

Soga accidentally traveled too far back in time, landing in 1906 instead of the intended date. He arrived in a swampy town where locals mistaken him for a Kappa, a mythological water creature in Japanese folklore, due to his appearance and the muddy surroundings. This bizarre encounter added a comedic layer of ancient folklore to the sci-fi narrative.

Foreshadowing: The time machine was unreliable and had no proper controls, making off-target jumps inevitable.

• soga
• 1906
• kappa
• time travel
• folklore

Tamura is revealed to be Haruka's future son from the year 2030. The discovery came when Tamura traveled forward to December 2030 and realized he forgot his camera. He then found a camera with a familial resemblance in Haruka's possession, and combined with his mention that his mother attended the same college, Yui and Haruka deduced the relationship.

Foreshadowing: Tamura mentioned his mother attended the same college, planting the seed for the revelation.

• tamura
• haruka
• future son
• time travel
• family connection

The time machine had a limited capacity and could only carry a certain number of passengers. When the group tried to return together to August 20, 2005, the machine couldn't accommodate everyone, so Komoto was ejected and remained stranded in the past.

Foreshadowing: Earlier trips had shown the machine was small and cramped, with multiple characters squeezing in.

• time machine capacity
• komoto stranded
• group travel

After being ejected from the time machine, Komoto ended up in the past where he encountered his past clubmates. They mistook him for someone's boyfriend because of a voice message that had been sent to the present Soga but received by the past Soga. This led to a tense chase, forcing Komoto to hide inside a locker to avoid confrontation.

Foreshadowing: The voice message mix-up was caused by the time travel complications affecting communication.

• komoto
• locker
• mistaken for boyfriend
• chase

Club advisor Hoze warned the group that changing the past could trigger a grandfather paradox, potentially threatening the entire universe. This warning prompted the team to rush back and ensure Ishimatsu, Koizumi, and Niimi didn't alter history, as their actions in the past could have catastrophic consequences for the timeline.

Foreshadowing: The warning came after the group had already made multiple trips, increasing the risk of timeline contamination.

• grandfather paradox
• hoze
• time travel danger
• universe threat

Masaru Niimi was the one who took the Vidal Sassoon shampoo from the bathhouse, which had sparked the earlier dispute between Haruka and Yui. Komoto discovered this truth while at the bathhouse, resolving the petty conflict that had seemed significant earlier in the story.

Foreshadowing: The missing shampoo created tension in an early scene, which paid off as a comedic resolution.

• niimi
• shampoo
• bathhouse
• comedy resolution

The remote was eventually recovered through a combination of luck and time. A dog dug up the remote that had been lost, and separately, the remote had been rescued by the earth itself over a century ago. These fortunate events allowed the group to fix the air conditioning and restore order.

Foreshadowing: The remote had been missing since it was broken, with multiple failed attempts to retrieve it from the past.

• remote
• dog
• air conditioning
• repair
• time travel resolution

After Tamura traveled to 2030, he realized he'd forgotten his camera and went back to retrieve it. He then discovered a camera with a familial resemblance in Haruka's possession. This visual similarity, combined with Tamura's statement that his mother attended the same university, led Yui and Haruka to conclude he was her future son.

Foreshadowing: The photography club had been developing photos throughout the story, making cameras thematically significant.

• camera
• tamura identity
• future son
• visual clue

The events of that summer, witnessing the time machine, the trips to different eras, and the discovery of Tamura's identity, inspired Professor Kohtaro Hozumi to begin pursuing his own time-travel research. This hints at a possible origin for the mysterious time machine and suggests a cyclical nature to the story's timeline.

Foreshadowing: Hoze had been the club advisor and directly witnessed all the time-travel events unfold.

• hoze
• professor
• time travel project
• future
• research

After the confusion about Komoto's supposed girlfriend was cleared up, Haruka learned the truth about his intentions, that he had genuinely wanted to ask her out, not that he was already taken. This revelation, combined with the emotional journey through time, led her to agree to a real date with Komoto.

Foreshadowing: Komoto's original plan was to ask Haruka out after buying sci-fi movie tickets, which was misunderstood from the start.

• komoto
• haruka
• date
• romantic resolution
• misunderstanding cleared