Help my friend find this drama

As the title says, my friend is looking for a korean drama. All she can remember is that the boy has to take care of his Grandpa. While living together, he makes a painting but his Grandpa ruins it

 mengosteen:

Are you sure it's korean?

There's this Taiwanese BL drama called Dark Blue and Moonlight that has scene of grandfather ruining his grandson's painting.

Could be! Thank you, will check it out