https://www.gamespot.com/articles/monster-hunter-world-high-rank-street-fighter-armo/1100-6459090/

Only a few more days remain to get the latest set of Street Fighter V gear in Monster Hunter World. The quest to earn Ryu's high rank armor will only be available on PS4 and Xbox One until May 24, making this your final opportunity to get your hands on it for the time being, if you haven't done so already.

Like the Sakura armor quest that recently appeared in the event rotation, players can get the high rank Ryu costume by completing a three-part Challenge Quest called The Awakened Satsui no Hado. Each quest requires a Hunter Rank of 13 or higher to accept and is set in the arena, with the objective being to slay a Nergigante.