Yun "Catch" Sang-ho joined the new Prime Clan early in 2015 as their jungler. They qualified for SBENU Champions Summer 2015 after going 1-1 in their group against Samsung Galaxy and Xenics during Champions Summer 2015 Promotion. Afterwards, Prime was sponsored by SBENU and renamed themselves to SBENU Sonicboom. SBENU placed last in Champions Summer and were forced to play in the LCK 2016 Season Spring Promotion. SBENU played Ever and managed to win 3-1 to requalify for the LCK, however Catch didn't play in these games.
SBENU played in the 2015 LoL KeSPA Cup where they lost 2-1 in the quarterfinals to SK Telecom T1. Catch did not play in this tournament and left SBENU on January 6th, 2016. He joined DetonatioN FocusMe, along with viviD, soon after.