Promised Afterlife

Young man Ono Ryuu who came from an empty depressing family starts his usual day in the life of an average highschooler while silently grieving the absence of his older brother , in wonder of what exactly happened to him and why was his corpse illegal for Ono and his family to see before he was held on a funeral. Until he discovers a stomach churning reveal of every unsolved mysteries of his life since he was born.