Shingo Shoji races with the Myogi NightKids team in a modified red Honda Civic SiR-II (EG6), featuring Milano Red paint, Mugen bucket seats, Mugen RNR wheels, a Mugen bodykit front end, Honda door visors, and a NightKids sticker. He employs aggressive tactics, deliberately nudging rivals to force spinouts when victory seems uncertain. Conventional downhill races bore him; he favors handicap matches, especially his signature "gumtape death matches" where racers tape their dominant hand to the wheel. This restriction doubles as a personal challenge and psychological warfare against opponents.

He shares a fierce, longstanding rivalry with NightKids leader Takeshi Nakazato, openly seeking to overthrow him despite their aligned racing philosophies. They deliberately avoid public camaraderie to prevent perceptions of friendship. Shingo is also childhood friends with Impact Blue navigator Sayuki.

Before and during Legend 3: Dream, Shingo ambushes Koichiro Iketani’s Nissan Silvia S13 on Mount Akina, intentionally bumping it into a spinout. This provokes Takumi Fujiwara to accept his gumtape death match challenge. Shingo wagers an apology to Iketani if he loses, but demands Nakazato’s leadership position if he wins. During the race, Shingo gains an early advantage but grows frustrated by Takumi’s adaptability. He rams Takumi’s Toyota AE86 to induce a spinout, which Takumi recovers from. After Takumi passes him using the gutter technique, Shingo attempts a mutual crash to force a draw. Takumi evades, causing Shingo to collide with a guardrail and concede defeat, witnessed by Nakazato and spectators.

Following this loss, Shingo appears alongside Nakazato as a background observer during Takumi’s rematch against Ryosuke Takahashi at Mount Akagi and Project D’s final race against Sidewinder, maintaining his presence in the racing community narrative.