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...
At the latest, 
it could take about a month.
.بينما قد يستغرق شهرًا على أكثر تقدير
Und wenn es lange dauert, einen Monat.
Máximo, hasta un mes.
De máximo, hasta un mes.
et au pire, jusqu’à un mois.
Al più tardi, ci vorrà circa un mese.
Se demorar, leva cerca de um mês.
Максимум — месяц.