In addition to Carpe Diem FC, 221 other teams from 31 different countries played in Boys 15. They were divided into 55 different groups, whereof Carpe Diem FC could be found in Group 7 together with Melleruds IF, Stord Fotball and Märsta IK. Carpe Diem FC continued to Play off B after reaching 4:th place in Group 7. In the playoff they made it to 1/64 Final, but lost it against DJK Roland Köln-West with 2-4. In the Final, DJK Arminia Eilendorf won over Helium FA and became the winner of Play off B in Boys 15. Carpe Diem FC also participated in Boys 14 during Gothia Cup 2018. They reached the 1/32 Final in B14 Play off B, but lost it against Kullavägens BK with 0-7.