so basically JB's first choice was cell number 3 and Joy was number 4 but it was changed later when someone suggested switching so JB went to cell number 6.
So he's been keeping an eye on them? Or just- HAHAHA
Look at these two
Sorry for the weird audio but I slow it down for a clearer view

Sorry for the weird audio but I slow it down for a clearer view
A legend once said...
"Park Sooyoung, Park Sooyoung"
"Park Sooyoung, Park Sooyoung"
" I choose JBnim "
Did you see that?

"But why is he acting different today? "
lol the caption
lol the caption

I believe that JB's last message was actually for Joy since after that he praised her for doing well (plus the handshake) although he still insists that joy was the mafia and even pointed her

He deadass went straight to Joy plus that ending

Jaebum offering his food to Joy :)
What is going on here? Hahaha
Let's all bounce, can we? 
Joy is beside him

Joy is beside him
Seulgi to Jaebum be like: just take care of Joy so she won't notice
So here's JB doing his thing

So here's JB doing his thing
He really likes teasing Joy HAHAHAHA
Joy also offering her food to JB :)
You can hear JB's laugh but he was out of frame so I zoomed it out for u hahahaha