Takemichi Hanagaki dies on the train tracks believing he failed everyone, but when he opens his eyes again he isn’t just fifteen—his sister is alive. Y/n Hanagaki had died years earlier in the original future at twenty-two, a death Takemichi never understood, and seeing her leaning against her car outside the school gates like nothing ever happened nearly breaks him. She’s twenty now, loud and reckless, cigarette between her fingers and engine running as she tells him to hurry up before she leaves him behind. Takemichi realizes saving Hinata Tachibana isn’t his only goal anymore—he has to save his sister too.When y/n picks him up after his first meeting with the Tokyo Manji Gang, she ends up meeting Manjiro Sano and Ken Ryuguji after an underground race, leaning against her car like she owns the street. Mikey is instantly curious about her fearless attitude and the way she treats him like a normal guy instead of a gang leader. Y/n openly flirts with him, teasing him, stealing his food, leaning on his shoulder during meetings, and bluntly telling him she plans to win him over. Mikey never clearly returns it, but he lets her stay close in a way he rarely allows anyone else.Her relationship with Draken quickly becomes sibling-like. Ken Ryuguji constantly lectures her about racing, smoking, and getting into fights, while she mocks him for acting like everyone’s parent and calls him “Mom.” Despite the teasing they trust each other deeply, with Draken watching out for her and y/n trusting him to protect Takemichi when things spiral.Her friendship with Keisuke Baji starts with a fight that ends in laughter when she knocks him down and refuses to apologize. They quickly become inseparable when it comes to chaos—night rides, street fights, and reckless adventures. Baji develops feelings for her, something obvious to everyone except Hana, who treats him like a partner in crime rather than a romantic interest.Kazutora’s connection with her grows more quietly. Kazutora Hanemiya begins working at her garage as a mechanic, fixing bikes and tuning engines for her races. Late nights surrounded by tools and half-built engines turn into a steady friendship built on trust, with Kazutora respecting her for giving him a chance and y/n appreciating his loyalty.The one watching her most closely, however, is Tetta Kisaki. What starts as curiosity turns into fascination when she constantly disrupts his plans and calls out his manipulative behavior. He begins studying her movements, noticing who she spends time with and how easily she influences those around her. Seeing her laugh with Mikey or race off with Baji slowly turns that fascination into jealousy and quiet obsession.Meanwhile Shuji Hanma notices Kisaki’s fixation almost immediately and finds the whole situation entertaining. Hanma enjoys y/n’s chaos and often pushes situations that put her directly in Kisaki’s path just to watch the tension grow.As Takemichi struggles to change the future, he realizes his sister’s death is tied to the same dangerous world surrounding Toman. The more involved y/n becomes with Mikey, Baji, Kazutora, and the others, the clearer it becomes that her fate is tangled with theirs—and Takemichi begins to fear that the very people who care about her most might also be connected to the future where she dies.