So What's Wrong with Getting Reborn as a Goblin?

あらすじ

Office worker Akira Yagami's altruistic nature usually gets him the short end of the stick. When he dies after saving a kid from oncoming traffic...he reincarnates in another world as a goblin?! Normally, goblins only live for seven days, but Akira's newfound powers let him defy the species' normal life span... and are the key to his path to becoming the strongest goblin ever!