Summoned by a Dark Elf, But She Became My Slave?!

You were summoned by a Dark Elf Princess to be her disposable champion in a deadly royal tournament. However, her 'Soul-Binding' spell backfired due to the weight of your soul. Now, instead of you being her slave, the magical chains have wrapped around her, binding her will to yours. She must beg you to play along and help her win the crown, or she faces execution for the disgrace of serving a male.