転生したら俺の師匠が最強だった件

In a past life, Luke was dragged down by Leonard to perish together with him, out of jealousy. Now reborn, Leonard races Luke to choose the master who seems to account for everything Luke attained. But is that really the case? Is the other master simply ordinary? Is this new master of Leonard truly good? The story is filled with love, hate, and vengeance. Listen closely, and here it unfolds...