Why a "drunk" tag here? I don't think Natsuki is drunk. Look at the broken alarm-clock... More likely Miyuki was trying to wake her up, but Natsuki seized her, being half-asleep.
It's been a running gag in the manga where Natsumi has a difficult time getting up in the morning and when she's tired she ends up falling on top of Miyuki (who always has to attempt to wake her up lol).