ある日の昼休み、突然 4人の友人とともに剣と魔術の異世界へと転移されてしまった男子高校生・小鳥遊強斎。
彼らを召喚した時空魔術師である異世界の王女によれば、この世界を救うため「勇者」として魔王を倒して欲しいとのこと。
突然のことに面食らう友人 4人をよそに「テンプレじゃん」とひとり余裕の表情の強斎だったが……、ここで王女から驚愕の事実が告げられる！
「――勇者様は4人のはずですが？」
“間違って異世界に召喚されてしまった男” 強斎の運命やいかに!?
One day ‘s lunch break, suddenly a male high school student Yuzo Ogata being transferred to another world of sword and magic together with four other friends. According to the Princess of Space-Time Magician, a foreign world who summoned them, they want them to beat the Demon Lord as Heroes to save this world. Suddenly I was surprised at four friends “Temple”, but it was a relaxing expression … … where the princess told of a startling fact. “`―― There should only be four braves though?”
“A man who was mistakenly summoned to a different world” What will be in store as to his fate?
