Here is the full list of all 24 Fearless Fantasy achievements.
Defeat the boss of Leuna Forest on veteran difficulty without consuming items
Defeat the king's lackey.. again
Crash a suspicious party
Meet a friend
Defeat the king's lackey
Kidnap a mysterious girl
Gain possession of a lethal liquid
Achieve 3 epic results in a row without aim enhancers
Slay a five-headed monster
Survive an encounter with Hew and his ride
Receive a private audience with his royal highness
Break up an engagement
Defeat the king's lackey.. once again
Defeat the king's lackey.. one last time
Collect all of the stars
Collect at least two stars in every chapter
Beat all chapters without being defeated or repeating a chapter
Beat all chapters on normal difficulty or above without being defeated or repeating a chapter
Beat all chapters on veteran difficulty without being defeated or repeating a chapter
Achieve 20 epic results in a row without aim enhancers
Achieve 50 epic results in a row without aim enhancers
Defeat the boss of Gyoza Desert on veteran difficulty without consuming items
Defeat he boss of Harrow Forest on veteran difficulty without consuming items
Defeat the final boss on veteran difficulty without consuming items