Choi Kanghee has no friends and is often misunderstood due to his scary appearance, but all he really wants in life are some friends. One day, he returned home to mourn for his grandmother's death anniversary, but a strange turn of events ends up reuniting Kanghee with his grandma! Can they work together to create new friends, or did it just turn more difficult?저세상 클라스! / Otherworld classes / The Otherworldly Class!