Hito ni Yasashiku

Three young men are living the good life as carefree but dirt poor bachelors when one day a young boy suddenly shows up at their door with a note reading "Take this kid in." They also find a mystery pile of money which they promptly squander, money meant for the hid's upkeep so they decide they have to care for him. Where did he come from? Are one of the three his father? Will his mother ever come back? Whatever the answers, they now have their hands full with their new charge. (imdb)