Munou to Tsuihou sareta Saijaku Mahou Kenshi, Noroi ga Toketa node Saikyou e Nariagaru

"Ah, finally... the curse is finally broken!" Asuka possessed ultimate power, having been raised and trained by a father who was a Sword Saint and a mother who was a Sage. However, due to a curse cast upon him by one of the Demon King's subordinates, he was unable to demonstrate his true strength and was forced to play a supportive role for his allies. Just as the curse is finally lifted during his adventures, his party members deem him "incompetent" and exile him. Asuka decides to continue as a solo adventurer, but after meeting Nadia, a cat-girl, and Tirou, an Undine, he finds companions who truly support one another. Together, they set out on a journey to save the world once again! The magic swordsman can finally unleash his true potential now that the curse is gone! Using the greatest power in history, he will rise to become the world's hero!

(Source: Funguild, translated)