Jungwoo :
Jungwoo would be grumpy at first because 'who dare disturb my slumber' am I right? Surely he wouldn't stay that way for long because once you stopped spanking his butt he'd look at your giggly happy face and he can't help but smile along with you.
Jaehyun :
'5 more minutes' dude. He'd be so tired that he would beg you to stop for 5 minutes. Of course when you wouldn't stop he couldn't help but smile and laugh. Part of him was laughing and smiling at how adorable you were. The other part was laughing and smiling in pain because he really wanted 5 more minutes of peace.
Taeil :
Taeil would still be disoriented from just waking up and he'd say something like 'What's going on?' as if he wasn't get slapped on the butt as a wake up call. He'd then stumble out of bed and turn around to give you a what are you smiling about look.
Johnny :
He'd think that he was still in some weird dream so he wouldn't say anything at first. Then he'd finally open his eyes and realize this was his life. Johnny would start saying he was up and if you didn't stop he gradually get louder as he'd start to laugh at your antics.
