8 titles recommended if you like Arion
Saint Seiya: The Heated Battle of the Gods
Saint Seiya: Warriors of the Final Holy Battle
Hunter x Hunter: Phantom Rouge
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Saint Seiya Heaven Chapter: Overture
Saint Seiya: Evil Goddess Eris
The Seven Deadly Sins: Grudge of Edinburgh Part 2
Is It Wrong to Try to Pick Up Girls in a Dungeon?: Arrow of the Orion