Description:

Irene Perreira is a boy who sleeps to run away from reality. People mocked him, calling him a 'deadbeat', but he had no wish to change. Until one day, he dreamt of a swordsman… It was a dream about a talentless man who had been training by swinging his sword for decades. (Source: MU)

Alternative Titles:

The Lazy Prince Becomes a Genius, The Lazy Lord Masters the Sword, От нерадивого аристократа до усердного гения, 怠惰公子、努力の天才になる