Tetsuya - The Man Called Mahjong Master - Vol. 10 Ch. 84 - Full-Throttle Horsepower

[MangaDex]

 

[Doomroar]

The trick is probably his glasses

 

[Nine_Gates]

Yeah, the glasses probably make the anti-slip visible in some way.

 

[5zlotych]

watch it be some uv reflecting gel and his glasses contrast uv light or sum shit like that