Ultra: Being Thanked Makes You Stronger

The protagonist was hit by a car while trying to save a child who was crossing the street playing football. As a result, he was blamed for scaring the child before he died. He was bound to the Ultra Good Guy System and became a cosmic being. He needed to collect "Good Guy Cards" to become stronger. Otherwise, he would be abandoned by the system and return to the second before his death. But in this world where monsters are rampant and people are unpredictable, as a cosmic being, how can he collect good guy cards? Is it to help the old lady cross the road? Or become a hero and save the world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.