Prologue

He finds himself back in the past. But it's different. Being summoned into the past isn't something new to him. But when he finds himself in his teenage years in a world where the Holy Grail War didn't exist. Alongside living in a family with his adoptive parents and even sister with their maids. He has no idea what to do... He's in a world of peace. A world where the hellish fire never took place and where many surprises awaits.