 If you liked
Oyasumi Punpun
|
 ...then you might like
Boku dake ga Inai Machi
|
Besides some similarities, both stories portray how the characters grow and learn on their mistakes. There is also a strong emphasis on psychology and understanding child's behavior.
Both Oyasumi Punpun and Boku dake ga Inai Machi feature a child in an adult's world, navigating some heavy issues with cute and nostalgic moments scattered in.
Both will tug on your heart strings, for sure.
Finally, both series have a captivating and interesting art style.