Seigi Nakata finds a pink sapphire ring in his grandmother’s house and is warned by her to never do bad things. Years later Seigi saves jewel appraiser Richard Ranasinghe de Vulpian from drunks. With his grandmother dead Seigi hires Richard to appraise the ring. Seigi prevents university classmate Shoko Tanimoto being tricked by a pervert and develops a crush on her. Richard warns Seigi the ring is stolen, although Seigi already knew this. He explains his grandmother had been an unemployed single mother and was forced to steal to support her daughter Hiromi, Seigi’s mother, and stole the ring from a woman who later attempted suicide...