Rakuntin and the Master's Tormentor

This is about a young man who found himself in a charitable institution with no memory of his past. His only clue is his medallion which intricately curves his name in Alibata writing. While searching for his identity he fortuitously met a teacher in swordsmanship, a master in his field. The master decided to makes him his protégée. While their friendship develops he realizes the need to protect his master against the Master's Tormentor, the same person who will lead him to reveal his past according to a prophecy of a fishball vendor.