The unique Sakurai family is made up of Harue (a widowed mother) and her three children: Tatsuya, Riku, and Junpei. Harue has had to go through many difficulties to be able to educate her three children, but she still has not lost her joy and has raised them in an open environment, where each one can express what she feels without hesitation. By losing his father when they were still very young, Tatsuya has always taken care of his two younger brothers, helping his mother to get ahead. Riku, the second brother, is the complete opposite of Tatsuya: nice, somewhat scoundrel and very successful among women; he only thinks about living day to day to the fullest and having fun. Junpei, the younger brother, is the most sensitive, homelike and affectionate, always ready to help at home and to take care of his mother and siblings.