That Time I Got Reincarnated as a Slime Season 4

Anime adaptation of part three of the Honzuki no Gekokujou light novel.

Second season of Dorohedoro.

After being granted a second life, now-teenage Arthur Leywin—an unparalleled, ruthless king in his previous life—has finally become an adventurer with the help of his mentor, Jasmine Flamesworth. Although he is still far from his ultimate goal of becoming more powerful than in his past life, Arthur demonstrates remarkable skill in adventuring, exceeding everyone's expectations. Meanwhile, Arthur's elven friend and Elenoir Kingdom's princess, Tessia Eralith, has also started adventuring. Due to the prolonged hostility between humans and elves, her duty is to spread goodwill and create friendly relations with human kingdoms. However, as a mysterious group threatens to harm the races' fragile relationship, both Arthur and Tessia soon find themselves becoming pivotal parts of a larger change for the better. [Written by MAL Rewrite]

A sword master who swore an oath of vengeance walks a bloody path.

For centuries, the Poison Masters have perfected the art of assassination. Among them, the Gero family stands as one of the five most powerful families of Masters, wielding unmatched skill and influence. Hikaru Gero, heir to this infamous bloodline, has lived his life deep in the shadows of the underworld, far removed from love or marriage. However, to ensure the Poison Master bloodline does not die out, the head of the Gero family declares that Hikaru's sister will be forced to bear an heir. Soon after, Hikaru crosses paths with Mei Kinosaki, a brilliant marriage swindler who also happens to be his current assassination target. Determined to protect his sister and solve the succession problem himself, Hikaru makes an unexpected request on the spot—asking Mei to help him get married. "...That's the first time anyone's ever proposed like that." And so, with the cunning marriage swindler Mei as his advisor, the elite assassin Hikaru sets out on the toughest mission for love. His goal? The ultimate marriage. The most unlikely duo—an assassin and a marriage swindler—take on the world's toughest mission for love! (Source: Official site)

In the deadly battle at the Watergate City of Priestella, Subaru and his allies barely emerged victorious—but their triumph came at a great cost. Through the "Authority of Gluttony," Rem was put into suspended animation, while Crusch's memories and even Julius’s name were devoured. As he searches for a way to save them, Subaru learns of the "Sage" Shaula—an all-seeing being said to possess every form of knowledge. His next destination is the Pleiades Watchtower, home to the Sage, the farthest tower standing in the vast, uncharted desert known as the Auguria Dunes—a place so perilous that even the mightiest "Sword Saint," Reinhard, failed to conquer it. The fury of nature, unknown magical beasts, and unimaginable dangers lie ahead. Together with his friends, Subaru embarks on a life-risking journey to reclaim what was lost. (Source: Kadokawa, edited)