Sentai Red Isekai de Boukensha ni Naru

Togo Asagaki was the Red Ranger in a heroic Ranger squad. During their final battle against an evil organization, he gave his life to guarantee their triumph. But fate had other plans, and he found himself reborn in an entirely different world. Embracing his new role as an adventurer, he transforms into Kizuna Red and continues his pursuit of justice, helping those in need.

(Source: Crunchyroll)