Grandpa and Pink

Yoon Jae, Ji Hoon, Yu Ri, Min Joo, and Min Hyuk go to meet Ji Eun's grandfather to go on vacation and help him out with his work. While Ji Hoon has many questions to ask about his condition, Min Joo begins to seduce Yoon Jae earnestly, leading to multiple misunderstandings between Yoon Jae and Ji Hoon.