Tatsuo Sato quits his job and loafs around aimlessly. Tatsuo Sato then meets Takuji Oshiro at a Pachinko Parlor. Takuji Oshiro later takes Tatsuo Sato back to his home, which is a modest shack. There, Takuji lives with is sick father, mother and older sister Chinatsu. Tatsuo becomes attracted to Chinatsu, who shines even in their difficult situation. ~~ Based on the novel "Soko nomi nite Hikari Kagayaku" by Yasushi Sato.