Premieres January 2025. The new PV is here. I haven't found an English article yet, so here is the Natalie source (edit: ANN article). Synopsis from AniList:
Rumors stir throughout the land: when the wielder of the black sword draws his dark blade, all who stand in its path are torn asunder…!
Köinzell, the mysterious young boy who carries the black sword, undeniably wields it with exceptional skill, but can he truly be responsible for the bloody rumors? Pursued by the Traitorous Lances, four powerful warriors who were thought to have been defeated by the Seven Heroes, the strength of the young swordsman will be tested to its limit. At battle’s end, only the shocking truth of Köinzell’s quest will stand above the corpses of his enemies…
An epic fantasy on the grandest of scales!
This guy really be rockin' the thigh highs and garter belt while trying to look edgy af.
Bonus points for the knives tied to his braids.
I was trying to figure out where else I've seen daggers tied to twin braids:
An Invincible villainess... whom I don't have time to look up right now.