In addition to Bygdö Monolitten IL, 135 other teams from 16 different countries played in Girls 15. They were divided into 22 different groups, whereof Bygdö Monolitten IL 2 could be found in Group 14 together with Kungälvs HK 2, Lögstör HK, Ljungslätt HF, Schiffdorf TV, Kolbotn IL 2 and Åsane/Flaktveit 2. Bygdö Monolitten IL 2 continued to B-Play-off after reaching 7:th place in Group 14. In the playoff they made it to 1/64 Final, but lost it against Palestra sport with 12-13. In the Final, HSG Nordwest won over MTV Dänischenhagen and became the winner of B-Play-off in Girls 15. Bygdö Monolitten IL also participated in Girls 14 during Partille Cup 2018. They reached the 1/16 Final in G14 B-Play-off, but lost it against Skövde HF 2 with 5-13.