The Hero Laughs While Walking the Path of Vengeance a Second Time, Vol. 1 (manga)

Revenge. But a single word defines Kaito Ukei’s second chance at life. After being mercilessly betrayed and murdered by his so-called comrades, he goes back in time to the day he met the princess who ultimately double-crossed him. But killing her isn’t enough—he wants to revel in every second of her agony as he looks her in the eye and robs her of all she holds dear. Her debt is the first to be repaid, though it shall not be the last. And by the time he’s finished, he will bathe in the blood of every last traitor who dared to cross him…