Return of the Back Alley Wizard

Story:

"One day, a wyvern flew overhead. The moment I saw it, I decided to retire." Aster, once a notorious troublemaker from the slums, clawed his way into the esteemed mage family—House Declan. But craving freedom, he fled… only to be hunted down and killed. When he opens his eyes again, he's back in the slums, caught in the hazy border between life and death. "This time, I'm going to build a library—no, a tower! Just like my old comrades dreamed of." "And for good measure, I’ll display the Declan family’s secret spellbook right on the first floor."