Alejandro Saab

Gabimaru reigns as the strongest and most ruthless assassin in his village. But now finds himself on death row—with only one way out: retrieve the Elixir of Life from a sinister island. Longing for freedom, he accepts the challenge. But with fellow convicts vying for the same prize and demonic beasts lurking, how will Gabimaru survive this harrowing quest? Source: Crunchyroll

Heine Wittgenstein is hired as the Royal Tutor for four princes in the kingdom of Glanzreich. They hate tutors, and he must find a way to teach them. (imdb)