Keppeki joou no Yarikaeshi  

The Cleanliness Queens Payback., 潔癖女王のヤリ返し, The Cleanliness Queen's Pay Back

The monarch, banished from her land, seeks the services of an acclaimed craftsman in order to acquire weapons necessary for battling a dark dragon that ravaged her castle and domain. Despite initial reluctance on the part of the blacksmith, events soon escalate as he insists upon immediate payment for his goods.