In addition to GIK Wasaiterna, 17 other teams from 8 different countries played in Boys 21. They were divided into 3 different groups, whereof GIK Wasaiterna could be found in Group 1 together with Lizikonggu Nantong University Handball Team, Önnereds HK, HC Kraainem, HK Varberg and USA National Team (OS). GIK Wasaiterna made it to B-Play-off after reaching 4:th place in Group 1. Once in the playoff they won every match inluding the Final against Mölndals HF, which they won with 17-16. Thereby GIK Wasaiterna won the entire B-Play-off in Boys 21 during Partille Cup 2013.