[1] In March 2019, shortly after his 17th birthday, Brems signed a two-year youth contract with OB.
[3] Brems started on the bench, before replacing Oliver Lund in the 58th minute.
In December 2020, Brems signed his first professional contract, running from 1 July 2021 and two years onwards, which also secured him a permanent promotion to the first team squad from the summer 2021.
[1] In the 2019-20 season, Brems only made one appearance for OB's first team, which was in the Danish Cup.
[7] On 5 July 2022 the club confirmed, that they had signed Brems permanently on a deal until June 2024.