In addition to HSC Haltern-Sythen, 77 other teams from 10 different countries played in Girls 18. They were divided into 12 different groups, whereof HSC Haltern-Sythen could be found in Group 5 together with Njård IL, RK Krim Mercator, IF Stjernen, Kvibergs HK and Örebro SK Handboll. HSC Haltern-Sythen continued to B-Play-off after reaching 6:th place in Group 5. In the playoff they made it to 1/32 Final, but lost it against Brabrand IF with 6-20. In the Final, Redbergslids IK won over 7 Drops/WAT Atzgersdorf and became the winner of B-Play-off in Girls 18. HSC Haltern-Sythen also participated in Girls 18 during Partille Cup 2023. They reached the 1/16 Final in G18 B-Play-off, but lost it against Skødstrup Håndbold with 12-17.