Our protagonist Shinomiya Shoutarou studies swordsmanship in the dojo of a castle town. One day when he is training in the mountains he saves a villiage girl named Tachibana Kasumi from some ruffians. Now starts their fun days together, as they get involved in all kinds of strange occurrences.

Swept up in the pace of Kasumi's life, Shoutarou can barely get any time in for training. But various encounters make him realize that true strength comes from the desire to protect those dearest to him.

What road will Shoutarou take to protect the smiling face of the woman he loves...?

[Translation of synopsis from Getchu.com]