Koyama Kazumi is one person in Japan who would give away money to anyone who needs it. He never says no, and because of that he is always broke since nobody returns his money. That never seems to stop him from loaning others anyway, though.
The main protagonists are idealistic people who are used by others and despised because of their naivety. Even so, they continue working through the hardships in life with a smile, never looking down on others, and giving their haters a hand once again, even while being despised by them.