Tabidachi Futatsu Boshi <Rei> (Kadokawa Bunko)

[Machine Translation] Ichirota Yahagi, the head instructor of a sword dojo in Kodenma-cho, rescued a baby kicked into the river seven years ago. The man who abandoned the baby was never found, and Ichirota and his wife Ikue decided to raise the baby as their own. As time passed, the boy, named Hyonosuke, showed a talent for swordsmanship and became so strong that he surprised Ichirota. What secrets does this bloodless son hold? Ichirota pursues a man who knows of Hyonosuke's origins. When the secret of the young sword's strength is revealed, the story of fate unfolds.

小伝馬町で剣術道場の師範代を務める矢萩一郎太は、7年前、川に蹴り落とされた赤子を助けた。赤子を捨てた男の行方は知れず、一郎太と妻の郁江は、赤子を我が子として育てることに。月日は流れ、兵ノ介と名付けられた男の子は、剣の才を発揮し、一郎太を驚かせるほどに強くなっていく。血の繋がらぬ息子にはどんな秘密があるのか。兵ノ介の出自を知る男を追う一郎太。幼き剣の強さの秘密が明かされたとき、宿命の物語が幕を開ける。