The Final Boss Wants to Die

Six years have passed since I was possessed by the "Evil God Hell Lord" — the final boss of a massive virtual reality game — and trapped in this world. The only way to escape from here is to be defeated as a boss. "Kill me!" Then, a low-level priest appeared — heavily armed with various legendary items — and subdued me. But then he said... "I didn't come here to kill you." He claims he doesn't want the massive experience points or fame. There's only one thing he desires. "I want you to live. Don't die — Iroha." I cannot leave this world unless I die — yet he whispers sweet words to me and puts a collar around my neck to keep me alive. Will I ever be able to return to my original world?