Kizaki Masato and Kizaki Tokiko is a young couple who have gotten married at tender age of 16 due to teenage pregnancy. Masato becomes the bread winner and Tokiko is a stay home mom with their son Naoya. When Naoya is 5, he suddenly becomes ill and later on was diagnosed with one cancer. Masato and Tokiko is forced to cope with the news and providing the best medical care they could afford for their only son.