The Heavenly Demon Destroys the Tower

A decade after the “Tower of Infinity” appeared across the world. Lee Kang-han, a man with a strange body that gains muscle just by sleeping, awakens as the “Heavenly Demon.” [Heavenly Demon Body (Rank: F~SSS)] But something is strange about the rank. Wait… is this actually weak? …No way. [System Notice: Player “Lee Kang-han” has achieved humanity’s first S-rank achievement.] [System Notice: Player “Lee Kang-han” has achieved humanity’s first…] Weakness is relative. To the Heavenly Demon… everything else is the enemy.