Sleep is comfortable in the work tiredness!?

This time that becomes gradually sleepless. "Sleep" is today.
I am often attacked by strong sleepiness before it gets into bed when it is busy. However, sleep that this is fortunately comfortable is pressed. It passes into a deep sleep at once when getting into bed with it attacked by strong sleepiness.
Getting up in the morning reversely is indeed painful though sleep is comparatively comfortable. The reason is easy. Because it is about 6:30 in my sleep to occur at midnight.