- 2013-03-01 MonoLog forms.
- 2013-06-09 First live is held at 2nd Dyz sponsored live, Re:, at Ash OSAKA.
- 2013-08-12 Karen (火憐) joins as support drummer.
- 2014-03-08 No name.-1812- released.
- 2014-03-23 MonoLog is scheduled to appear at Qualia sponsored event, minoru ga Minoru to Minarunrun♪ (minoruがみのると皆るんるん♪), at Umeda (梅田) ZEELA. However, vocalist KANI is diagnosed with temporary hearing loss, and MonoLog cancels their appearance.
- 2014-03-23 YUKUE (Cancelled) released.
- 2014-03-31 MonoLog announces its disbandment via members' blogs. (Originally, this announcement was to be made at their 2014-03-23 live, but couldn't be due to their cancellation of that live appearance.)