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In addition to FK Lillehammer, 221 other teams from 31 different countries played in Boys 15. They were divided into 55 different groups, whereof FK Lillehammer could be found in Group 17 together with St. Paul Blackhawks Gold/White, Halvorstorps IS 1 and Enebybergs IF. FK Lillehammer continued to Play off B after reaching 3:rd place in Group 17. In the playoff they made it to 1/32 Final, but lost it against Magnet Youth Sports Academy with 0-2. In the Final, DJK Arminia Eilendorf won over Helium FA and became the winner of Play off B in Boys 15. FK Lillehammer also participated in Boys 14 during Gothia Cup 2018. They reached the 1/32 Final in B14 Play off B, but lost it against Hong Kong FC with 0-4.