Second-year Kasaba University student Nakata Seigi rescues a foreigner being harassed by drunks. Wavy blond hair, blue eyes, and clear skin. The man who speaks unfaltering Japanese is Richard, a very competent jeweler with customers both domestic and international.
Thanked by Richard for being a "hero of justice," Seigi hires Richard to valuate a memento from his late grandmother, a pink sapphire ring. Through Richard, the mystery hidden in the ring is eventually revealed...
She was what people call 
a single mother nowadays,
كانت ما يدعوه النّاس بأمٍّ عزباء 
،في يومنا هذا
Sie war, wie man es heute nennt,
eine alleinstehende Mutter.
Ahora se les dice madres solteras.
Ahora se les dice madres solteras.
Elle était également
mère célibataire.
Era quella che adesso viene chiamata "mamma single".
Ela era o que chamam agora de mãe solteira.
Она осталась матерью-одиночкой.