SCARLET

Scarlet, the protagonist of this work, is a princess whose father, the king of a certain country, was murdered. However, after failing to exact revenge, Scarlet wakes up to find herself in the "Otherlands." In this "Otherlands," filled with madness, it is said that if one does not exact revenge on their nemesis and reach the "Infinity Land," they will become "nothingness" and disappear from existence. Will Scarlet be able to exact revenge on her nemesis without becoming "nothingness"? The story unfolds as the endless journey for revenge begins. (Source: Animate Times, Translated) — Description from AniList community (anilist.co).