On this website, you can also get with the chat times and much more.
Most people believe that Seven is actually the true ending based on the main game because out of all of the RFA members, he breaks the fourth wall the most.
But at the end of the day, just like all the other theories regarding MysMe, this is not canon.
On the night of the 4th Day, Zen tells the player that he had a dream that all of them were programmed robots.
The chat times for Mystic Messenger are as follows: Day 1 00:03 — 707, Yoosung.
I was just wondering whether you had lunch already.