Afterlife Classes is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

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?