Tadashi Kikuchi/Relationships

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### Ainosuke Shindo

Ainosuke is Tadashi's boss. Although Tadashi treats him formally, Ainosuke sometimes calls him a "dog" when he's angry and a "good boy" when Tadashi fulfills his wishes. Tadashi obeys any order Ainosuke gives him even if Tadashi initially shows some concern about doing so, he will still obey even if it's to sacrifice himself to save Ainosuke from being accused of perjury for his corrupt political dealings. He prepares whatever Ainosuke asks for, which was revealed in the spinoff manga when he bought a flower bouquet that Ainosuke asked to give to Langa Hasegawa. Tadashi monitors and assists Ainosuke in "S", watching him through cameras, picking him up in a car before the police arrive, and piloting a helicopter for him.

As a child of a Shindo family servant, Tadashi has been serving Ainosuke since youth and he is the one who introduced him to and taught him how to skateboard, seen in a flashback with a young Ainosuke who has tears in his eyes because of the strict discipline from his aunts. Ainosuke is very important to Tadashi, but Ainosuke feels differently about him. Even in the past, Tadashi never crossed over the line of his position. Tadashi used to be a very important person to Ainosuke, but Tadashi didn't realize that. Since Ainosuke was born into special circumstances, Tadashi couldn’t even imagine that possibility before their friendship broke. Tadashi was a friend to Ainosuke until he did nothing when Ainosuke's father Aiichiro Shindo burned his board and banned him from skating. Ainosuke is furious when Tadashi, with the stated goal of making Ainosuke renounce skating, enters the tournament as "**Snake**," but begrudgingly allows it in the end, daring him to go ahead and try and win. After the confrontation, Tadashi is seen practicing skateboarding after looking at a pair of hearts engraved at the bottom of a skating bowl. Tadashi blames himself for how Ainosuke changed into a more cruel person as an adult and regrets teaching Ainosuke how to skate, as that hobby could not be shared with another child of Ainosuke's social standing, further isolating Ainosuke.

Tadashi changed his mind about taking skating away from Ainosuke after several conversations with Reki Kyan about how skating should be fun, and forfeited his race against Langa in the hopes that Langa could teach Ainosuke to enjoy skating again. During Ainosuke's final race with Langa, Ainosuke recalled how skating with Tadashi during their youths was fun and seems to have let go of his former grudge against Tadashi. Ainosuke did not push Tadashi into taking the heat from the perjury charges for him, and instead claimed, with a smile, that Tadashi would be his dog for the rest of their lives. It seems as if the sour relationship he had with Ainosuke for so many years has changed after the tournament. After this Tadashi probably will never leave Ainosuke's side and they will begin the process of reconciliation and healing to untangle the knots from their relationship, though it will remain as master and servant. It was also revealed that Ainosuke was the one who leaked Representative Takano's corrupt dealings and the entire scandal went according to Ainosuke's plan.

### Reki Kyan

Tadashi meets Reki in person after hitting him with a car and taking him to a love hotel in an effort to bribe him to keep quiet about the accident in order to not cause trouble for his boss, Ainosuke Shindo. Reki rejects the money, but states he has no intention of causing trouble for Tadashi. Tadashi soon recognizes who exactly Reki is and tries to talk him into giving up skateboarding because Tadashi believes it's an undesirable hobby that ruins lives. Reki argues back and refuses, saying that it's simply really fun and in doing so realizes that he'd lost sight of that idea too.

Later Tadashi approaches Reki at Dope Sketch with the invitation for him to participate in the tournament as Ainosuke's stand-in opponent. Tadashi warns Reki against skating with Ainosuke, but Reki, having recovered his love for skating, again refuses Tadashi's advice and decides to skate, since it's fun for him and that's the only reason he needs to skate. Tadashi bitterly gives up trying to talk Reki out of skating and leaves.

After Ainosuke barely wins in a disastrous race against Reki, Tadashi recalls how Reki is similar to a young Ainosuke with his pure love for skating and realizes that forcing Ainosuke to give up skating is the wrong thing to do and instead Ainosuke must relearn his love for skateboarding.