Different Time Zones.
Best time to be on at my place is around 12PM~8PM, 3AM~7AM most of the people are on at the time.
In PST, IU gets on around 3~5AM, 10~11AM, and 9~10PM.... this makes sense if she is in EST(3~4 hours faster than PST)...
Women: They are always into the things called "Love"... ALWAYS.
Seriously, the moment the whole class knew about our relationship, we were surrounded by girls --x