Itsuka, Yuusha Datta Shounen
いつか、勇者だった少年
Hayato was once called to a different world where he fought alongside others in battles against magical creatures. After two years, he was sent back to his original world. When those from the other world began to retaliate, Hayato did not feel fear. Instead, he felt excitement, seeing the conflict as an opportunity to return to the thrilling life he had left behind.