Oinochi Choudai!

Ruri is a ninja who struggles with nearly every assignment due to her lack of skill. Despite this, she stays determined, motivated by her devotion to her sick younger sister, Murasaki. She discovers that a reward of 100,000 ryo is being offered for Tokuyama Tenryori, the shogun of Edo, who resides in a heavily fortified castle protected by traps and magic. Ruri prepares to confront the challenges of Edo Castle.