Besides undercut frenemies Otabek & JJ from YOI, here’s a fun reminder that Hosoya Yoshimasa&Miyano Mamoru also played:
Free! Eternal Summer’s Yamazaki Sousuke (Hosoya) & Matsuoka Rin (Miyano)
Chihayafuru’s Mashima Taichi (Miyano) & Wataya Arata (Hosoya)
Bungou Stray Dogs’ Kunikida Doppo (Hosoya) & Osamu Dazai (Miyano)
Ajin’s Kaito (Hosoya) & Nagai Kei (Miyano)
Basically:
FRENEMIES4LIFE (For the most part)
Update (April 2019): Is…IS THIS THE GREATEST PAIR UP YET???
Sarazanmai’s Reo and Mabu