SK8 the Infinity Manga

High school students Reki and Langa are hooked on one thing—a dangerous, top secret, no-holds-barred downhill skateboarding race called “S.” When Reki takes Langa, a transfer student, to the mountain where “S” is held, Langa finds himself sucked in. These colorful skaters will take you through a thrilling story of skateboard battles and unlimited possibilities!
High school students Reki and Langa are hooked on one thing—a dangerous, top secret, no-holds-barred downhill skateboarding race called “S.” When Reki takes Langa, a transfer student, to the mountain where “S” is held, Langa finds himself sucked in. These colorful skaters will take you through a thrilling story of skateboard battles and unlimited possibilities!

Blu-ray & DVD Volume 2, SK8 the Infinity Wiki

sakuda] Adolescence - Sk8 The Infinity DJ [JP] - MyReadingManga

Sk8 Infinity Anime Skateboard Anime Skate Infinity Posters - Anime Sk8 Poster Home - Aliexpress

So Langa finally realized it (it's from Sk8 chill out, a spin off manga) : r/SK8TheInfinity

SK8 the Infinity Acrylic Stand Collection - Tokyo Otaku Mode (TOM)

Anime SK8 The Infinity Manga Peripherals Cushion Pillow Cartoon Kawaii Double Sided Special Shaped Stuffed Plush Doll Toys Gift - AliExpress

SK8 the Infinity - Wikipedia

Sk8 Infinity Acrylic Keychain Acrylic Standing Plate Holder - Sk∞ Sk8 Model - Aliexpress

Chapter 3, SK8 the Infinity Wiki