Crunchyroll will be streaming the anime

Anime Staff:

• Director: Keitaro Motonaga
• Series Composition: Takamitsu Kono
• Character Design: Masami Sueoka
• Music: Keiji Inai
• Studio: A-CAT
• Production: Slow Curve

TurtleMe (original author) is also involved in the adaptation as a story supervisor and executive producer

Source: https://animecorner.me/the-beginning-after-the-end-gets-anime-in-2025-reveals-trailer-and-staff/

Series Synopsis (taken from Tapas)

King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will. Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again.