The celebrity siblings will be the next guests on MBC variety show 'Secretly, Greatly'. It's reported that Thunder prepared a scenario to trick his noona, who absolutely loves cats. As you can see in the still cuts, Thunder is full of smiles and excitement at the thought of getting his sister. You can also catch a short preview of the upcoming episode in the clip above. 

SEE ALSO: Netizens speculate Seventeen's album sales for '17 is Right Here' were manipulated

'Secretly, Greatly' with Thunder and Dara is airing January 8!