Kazuki was a high school student in Japan who was transported to this world after being hit by a truck, here he met his party.

Frein is a fighter, born with the power to be invulnerable to any blow received, one day she met Kazuki and joined with him.

Ella is a goddess who saved Kazuki from death by transporting him to this fantasy world.

Ellenox joined Kazuki's team in search of adventure and friends, Ellenox defeated the demon king by mistake condemning Kazuki to stay in that world forever.