In addition to HSC Haltern-Sythen, 19 other teams from 6 different countries played in Boys 21. They were divided into 3 different groups, whereof HSC Haltern-Sythen could be found in Group 2 together with IK Baltichov, Brain Tree world, Torslanda HK, Herning FH and Lugi HF 2. HSC Haltern-Sythen continued to B-Play-off after reaching 5:th place in Group 2. In the playoff they made it to 1/4 Final, but lost it against HK Ankaret with 13-23. In the Final, IK Baltichov won over HK Ankaret and became the winner of B-Play-off in Boys 21. HSC Haltern-Sythen also participated in Boys 21 during Partille Cup 2022. They reached the Semi final in B21 B-Play-off, but lost it against HSG Tarp-Wanderup with 11-25.