2021/22 Blossom League

The 2021-22 DSAFF Blossom League, also known as 2021-22 Blossom League or simply Yucatan 2021, is the inaugural edition of the Blossom League, the first international association football competition involving the U-21 men's national teams of the associations of the football federation of Delusia. The league phase of the competition will take place from 18 September 2021 to 25 February 2022. The Final Four will take place in Yucatan in February 2022.

Eighteen DSAFF national teams were divided into four leagues: 4 teams in each League A, B and C. League D, having 6 teams, was divided in two subsections. Each team will play six matches within their group (using the home-and-away round-robin format), on double matchdays in September, October and November 2021.

Every team competes to become the DSAFF Blossom League champions. The winner for Leagues A, B, and C will qualify for the Final Four in February 2022, while both leaders in each League D subdivision will face in a two-legged playoff to determine the League D winner. The Final Four will be played in a knockout format, consisting of the semi-finals, third place play-off, and final.

Teams will also compete for promotion and relegation to a higher or lower league. Every league winner (except League A's) will be promoted, while the last-placed teams of each league (except League D) will be relegated.