doojoon is mad at dongwoon.
Want to know the reason why?
Because dongwoon reveals at burning the beast showtime, that junhyung kissed him while he was drunk.

Dw: 'about that..when junhyung hyung was drunk, he pecked me on the lips'
All: 'mwo??'
Gk: 'you kissed? Like this?(showing the gestures)'
Dw: 'no he just pecked me and that's it'
Jh: 'aigoo is it that bad..'

(On dongwoon and doojoon's room)

'of course it's bad! You're mine and i don't let anyone touch you either kiss you even it's just a peck!' Doojoon yelled. He's really mad.
'And you don't have to say that on the broadcast! Are you trying to make me become this mad dongwoon??'
Dongwoon didn't answer
He just stares at his own toes
'M-mian hyung.. I didn't mean that'
'I don't easily forgive you.'
'Hyung..don't be mad at me..'
then doojoon grabs dongwoon's shoulder. Facing him
'but dongwoon..he pecked you. On you're ing lips which is mine. You belong to me. You're mine. I don't let anyone touch you.'
'I..i know..but that's an accident and i don't feel anything..please don't be mad..' 
dongwoon cries on doojoon's shoulder
doojoon shocked. He grabbed dongwoon's body and pulled him onto his embrace
'I'm sorry that i was mad. I know, he's under alcohol and uncontrollable. I know, you don't feel like doing anything with him. Because it's just a peck. I should be the one who says sorry because i'm mad over this little thing. I'm sorry, dongwoon-ah'. Doojoon said as he dongwoon's back
'You're mad because you also want the kiss' dongwoon said to him
'It's ok, i could kiss you anytime any day' doojoon smiles. And he kissed dongwoon on the lips
and dongwoon response. Because yeah, doojoon deserves this
'Next time if i get drunk i should get more than just a kiss'. Doojoon said as he dongwoon's hair
'No problem. I've always prepared for that everytime you go drink' 
'You nasty magnae!' And they laughs.