Tales of Wedding Rings Vol. 9 (manga)

Desperate to obtain the power of the Ring King's legendary sword, Satou and Amber begin plotting to sneak into the Empire's storehouse to steal it. However, two fearsome golems guard the way, and they're far too powerful to overcome with strength alone! Meanwhile, Hime's training in light magic continues, and just when she feels like she's hit a wall, a mysterious young woman appears before her, offering guidance...but can she be trusted?