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.

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.

With the "hearts tower" task, the housemates found themselves reflecting on what love truly means to them. 

And of course, what’s a K-Drama without a little ‘selos’ moment? Enter Bianca de Vera and Dustin Yu. After a chat in the garden area, Bianca seemed affected when she noticed Dustin getting extra playful with AZ while washing dishes. The boys caught on Bianca’s sudden silence as she watched Dustin and AZ laughing it up at the sink, which sparked a round of teasing. They jokingly shipped Bianca with Michael—just to see Dustin react. And react he did. Dustin walked out when Bianca and Michael started talking about how they already followed each other on social media even before entering Kuya’s house.

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.