Hangyaku no Soul Eater: Tamashii no Hoshokusha to Shoujotachi

"We have no use for weaklings here!"

"I will become a strong swordsman," but contrary to his childhood wish, Sora was banished from the Goken family, masters of the Genso Itto style of swordsmanship. Branded as useless and having lost everything, he becomes a “soul-eating dragon” and vows revenge!

(Source: Comic Earth Star, translated)