(Trans) Compilation of JYJ The Day's Commentary:
Junsu: Yuchun seldom sleeps alone whenever they go abroad. He would ask either a member of his manager to sleep with him.
There are a lot of eating scenes in The Day, and Junsu whined "Why are there so many eating scenes...I'm hungry."
At the scene of Yuchun eating gamja-tang (potato stew), Junsu said in English "My favorite Korean food". XD
Junsu, "I want my members to show me support too. I have already showed my support for you guys with chicken and buffet."
Jaejung, "We will give you support, but that means no more birthday present for you."
Junsu, "All right, I'll be waiting."
Yuchun, "A luxurious(expensive) support."
Jaejung, "Then you'll pay the bill for it."
Upon watching a scene with Yuhwan, Jae and Junsu said to Yuchun, "It's good to be young. Yuhwan is better looking and younger than you."
Yuchun said that he would sit on the floor with a glass of red wine and listen to LPs when he's upset, but recently he changed drinks.
Junsu said, "Soju bombs?"
Junsu said that Yuchun looked like a ghost from Ju On when he's washing his face. Yuchun made the sound that the ghost made in the movie XD
Jaejung, "My parents are hurrying me to get married."
Yusoo, "Hurry get married! If you don't get married, what will happen to us?! No such thing as younger brothers getting married first."
Jaejung, "Get married straight away without dating?"
Yuchun, "Meet, get to know her, date for 3 hours then get married."
Yusoo, "Hyung has to cook everyday even after you're married."
Jaejung, "Of course I will, but my wife has to cook too."
Yusoo, "It'll be the best if your wife cooks at home, but when you're out playing(like barbeques), the man should cook."
Jaejung asked them when they feel the happiest.
Junsu, "When I'm singing and dancing on stage."
Yuchun's answer was also "When I'm on the stage."
When Jaejung was asked the same question, he said, "When I am with the both of you."
Yuchun, "I knew you would say that!"
Jae, "Let's try it again. When do you feel the happiest?"
JS, "When I'm on the stage w the members, 3 of us singing and dancing together."
Yuchun said something along those lines, and Jaejung said, "When I'm on the stage, sharing excitement with the fans."
Jaejung, "I don't like giving my niece/nephew new year's money. It's supposed to be for the child but it's taken away by the mother."
Jae commented that he likes the fact that Yuchun's bedroom and studio are one.
Yuchun, "The biggest plus point is that I can write it down immediately if I have inspiration from the moment I wake up."
Yuchun, "Junsu is the god of kissing. His kissing skills have improved (after Elisabeth)."
Junsu, "It's not kiss, it's god of bobo!"
Yuchun, "It's almost the same thing, both are about lips touching."
Jaejung, "Did you have to practice first? Who did you practice kissing with?" Junsu, "I imagined it."
(Alternatively, Junsu could have said "It's not a kissing scene, it's a bobo scene!")
[About the "kissing" tweet, I'm not sure if the OP made a mistake about "Kiss신" which can mean "Kiss Scene" and also "God of Kiss". Take it with a pinch of salt.]
Jaejung, "This is the second time I've had a birthday party outside. The first time was when I was in junior high. I was really happy."
Jaesu to Yuchun, "Both of you have really good genes. Your mom is so lucky, how could she give birth to two kids who are both so good looking?"
At the scene of Yuchun's bathroom, Junsu said, "Why is it so clean? It became cleaner. It wasn't so clean in the past.
Yuchun, "It has always been clean."
Jaejung, "Yes, it has always been clean because Yuchun hardly uses it."
Original source: http://www.weibo.com/parkamylove