Hi

I am looking for a drama with hyperactive,highly energetic male lead.He dont have any internal conflict that he had to deal with.

He is super lovable a guy with no sad past or sad things surrounding him.He enjoys his life.with friends and family.

He is enthusiastic about everything,he is kind a cool character that everyone fall in love.

Please do recommend me any drama with this male lead.

Descendants of the Sun (but it's not very good)
Let's Eat - Excellent fits every category.
Sassy Go Go - pretty good drama - not excellent but good
The Village - Achiara's Secret - there's no male lead, but one of the main characters fits your description perfectly - he's the junior cop in the town and played by Yook Sung Jae
Mr. Nietzsche in the Convenience Store
Beautiful Gong Shim, though the drama kind of loses its hype aroud episode 12-14
Flower Boy Next Door
Lee Gun- Fated to love you
Hyper-active main lead... DOK KO JIN from The Greatest Love  and  I agree with Mighty_Brosia... LEE GUN from Fated to Love You.
Descendants Of The Sun! It's such an amazing drama