Highway Go Go, Part 1 (Episode)

Highway Star, Part 1 (ハイウェイ・スター その1) is the one hundred second episode of the JoJo's Bizarre Adventure anime and the twenty-eighth episode of Diamond Is Unbreakable. It covers Chapter 381 through Chapter 386 of the manga.
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Summary
During a game of Cee-Lo with Rohan, Josuke starts piquing the former's interest with a series of rolls that suspiciously keep ending up in the latter's favor. Convinced that Josuke is cheating, Rohan stabs his own pinky with a pen and bets 200 million yen and Josuke's pinky that he can figure out how Josuke is cheating in the next round. Additionally, he brings over Tamami Kobayashi to use The Lock as a lie detector of sorts. Meanwhile, Mikitaka's dice disguise begins to slip, first when he vomits from motion sickness, and later when he develops a rash from the sound of nearby firetruck sirens.

When Josuke tries to hide these signs, Rohan further catches onto him and his suspicions are further proven when The Lock detects Josuke's foul play. However, the game ends up being cut short when Rohan discovers that he accidentally set his own house on fire, hence the firetrucks from earlier. Josuke takes this as an opportunity to bail out with Rohan's money, healing the latter's finger on the way out, as Mikitaka's disguise falls completely apart behind Rohan and Tamami's backs. The next day, Josuke runs into Mikitaka and his mother, who claims that his self-identification as an extraterrestrial is a joke that he frequently pulls off on his peers; however, Mikitaka asserts that he brainwashed the woman into believing that she was his mother, leaving the issue of his true nature unresolved. Meanwhile, Yoshihiro Kira, who too was baffled at the strange student's real nature, was also angered at how things have turned out and then flies off to create more Stand users and protect his son.

Meanwhile, at the Kawajiri's residence, Hayato Kawajiri returns home from school and replays the tape he secretly recorded of his parents, noting how this is the first time in a while that Shinobu bared herself to Kosaku. Looking over his recording, he notices his father acting suspicious at his desk and turns up the volume, hearing the angry ramblings of the disguised Yoshikage Kira.

Some time passes after Rohan's house burns down, and he eventually meets up with Josuke on the bus. The two are visibly irritated at each other's presence, with Rohan being particularly angry at Josuke for the 700 million yen property damage the fire caused. When the bus passes through a tunnel, Rohan notices a room with what looks to be Yoshikage Kira severing a dead woman's hand inside. Josuke refuses to believe Rohan's warnings, mistaking them for a means of getting back at him for the events of their Cee-Lo game, much to the latter's fury at the former's disbelief.

Rohan decides to investigate the tunnel himself and happens upon the mysterious room, only to find it empty. However, upon leaving, he finds himself being chased by a group of disembodied feet, though they can only go up to 60 km/pH, allowing Rohan to escape on his motorcycle by going 10 km/pH faster. When Rohan is forced to slow down to avoid an oncoming truck, the feet latch onto him and start sucking away his energy; at that point, the feet form into the Stand known as Highway Star, who explains that he is feeding off of Rohan for his nutrients.

Josuke decides to investigate the tunnel despite having had a falling out with Rohan on the bus; he comes across Rohan's motorcycle, which zooms out of the tunnel before falling apart. Later, Josuke sees Highway Star latched onto Rohan before the two of them disappear. Josuke chases them down to the room in the tunnel, which Highway Star uses as a trap to lure in prey. Highway Star tries to coax Rohan into asking Josuke for help as a form of live bait, but Rohan refuses, citing the feeling of power that comes from denying the requests of someone strong, and warns Josuke of Highway Star's plan. However, Josuke steps in anyways out of sheer arrogance, at which point Highway Star begins chasing him down. Hearing Rohan's warnings about Highway Star's 60 kph speed limit, Josuke uses Crazy Diamond to fix Rohan's motorcycle before driving off, with Highway Star in hot pursuit.

Manga/Anime Differences

 * Removed Josuke saying that compared to getting two special results in a row, stranger things have happened before like his grandma being hit by the same car twice in one day and being fine afterwards.
 * Removed the scene with Rohan about to bite the die to test its hardness, until Josuke stops him by saying he forgot to wash his hands after taking a dump earlier.
 * Removed Mikitaka sweating out of fear, and Josuke sneezing on Rohan to pretend the wetness of the die was from his sneeze.
 * Removed Tamami's monologue about not being impartial and hoping to see Josuke's finger get cut off.
 * Added a Morioh Radio segment which mentions Fungami's accident in the tunnel.
 * Rearranged Hayato spying on his parents to another scene chronologically. In the manga, it shows him watching the surveillance tapes right after the incident with Kira and Shinobu on the same night, whereas the anime moved it to the next day.
 * Removed Josuke saying he's a young guy so he'll stand in the bus after Rohan told him to sit down, angering Rohan because it implies that Josuke is calling Rohan old.
 * Removed Josuke thinking that Rohan's a creepy guy, after feeling Rohan glare at the back of his head while sitting down in front of him.
 * Removed a line of Josuke thinking that Rohan is trying to pick a fight with him when Rohan first asks if he saw the room in the tunnel (but kept Josuke's expression on his face).
 * Changed the scene of Josuke and Rohan arguing into a flashback, with Rohan already at Futatsumori Tunnel with his motorcycle. Also removed Josuke saying he never wants to see Rohan's face again during that scene, although Josuke mentions that he had said it when he arrives at the tunnel later on in the episode.
 * Removed Rohan wondering if he was hallucinating, or whether the tunnel was a trap before he goes in.

Trivia

 * In the official English subs, this episode's title is changed to "Highway Go Go, Part 1" to match Highway Star's name change to "Highway Go Go".
 * The "To Be Continued" arrow appears halfway through the episode, at the conclusion of the Mikitaka arc, in reference to the original chapter's unusual placement.