Week 5 inside the "Pinoy Big Brother Celebrity Collab Edition" house felt like something straight out of a K-Drama. With Korean actor Kim Ji Soo entering as a special guest, the vibe was infused with just the right amount of kilig and feel-good energy.

Ji Soo's oppa-dorably sweet personality meshed so well with the housemates. Even netizens couldn't get enough of his chemistry and banter with the group, especially with Klarisse de Guzman, who played his 'endgame' in the original P-Drama the housemates came up with for their weekly task.

Housemates Will Ashley and Michael Sager were tasked with writing two original drama stories with Ji Soo as the main character. He had to deliver three Filipino lines in each act. For every line he uttered perfectly, the housemates earned the chance to remove one layer from their “hearts tower” challenge, wherein the housemates, divided into two groups, must stack a five-feet-tall tower of cups with a half-heart base on a floating platform. To win, the two groups must carry the platforms across the pool and bring them together to form a full heart.

As the week went on, Ji Soo grew fond of the housemates. On his final night in the house, he surprised everyone by cooking ramyeon (noodles) for them as a heartfelt thank-you gesture. It doesn’t get more K-Drama than that! 

Viewers can watch "PBB Celebrity Collab Edition" online via live streams on Pinoy Big Brother's YouTube page, Kapamilya Online Live (KOL), iWantTFC and TFC.