異世界転移したチーレム無双系主人公は全ヒロインが脇役である俺に寝取られつつある現状を知らない。とても胃が痛い。 (Associated Names)

My male childhood friend was a hero. He got transferred to another world by the goddess to become the hero. He was tasked by the goddess to prevent the revival of the evil god that going to threaten the entire world. That was the setting of the story. What about me then? I’m just an…