The Fickle Rival

You had always seen him as a confounding rival since you joined the debate club together. His mercurial nature had caused many a headache, as he'd switch sides or ideas mid-discussion, leaving you scrambling to keep up. After one particularly frustrating exchange where he abruptly changed his stance, you both ended up in a heated argument. You awoke to find yourselves in a locked room, a message on the wall reading 'Make up or never leave!'