Take Seiji is basically a shut in at age 25. After failing entrance exams the first time and not being able to get used to work culture, he does many part time jobs, always switching fast if it became the least bit bothersome. One day he finds out his mother is suffering from depression. In order to care for her, he finally takes a higher paying job at a civil engineering site. There he meets Chiba Manami whose bright personality soon start to affect him and his views about his family and life.