21st century boys manga

Description : Growing older is pretty rough and Kenji is finding out just how hard it can be as life starts wearing down on him. On top of trying to make ends meet running a convenience store he has to care for the niece that his missing sister left in his care. Memories of youth make it easier, until those memories come back to haunt him. Continuation of Urasawa Naoki's masterpiece, 20th Century Boys. -- Wikipedia