Jeosesang Class!

Choi Kang-Hui 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 Kang-Hui with his grandma! Can they work together to create new friends, or did it just turn more difficult? (Source: Naver, translated) Note: Chapter count includes an extra and an epilogue.