This Protagonist Is a Little Wicked

A young man wakes among piles of corpses on a broken cart, having forgotten everything. Alone, he sets out on a crooked path... In the void, countless planets shine. Have you ever wondered where the starry sky ends? When you travel across the stars, pierce the mists, and reach the end of the cosmos, you discover that you have been living in a prison all along. How would you feel? And when you escape that prison only to find yourself trapped in another, where will you go from there?