| August 2018 | ||
| 19/08/18 | The alliance ハーレム was founded. | |
Founding members::  あががい. | ||
 The alliance reaches a population more than 100. | ||
| 21/08/18 | Joining of:エンリ. | |
| 27/08/18 | Joining of:akari. | |
| September 2018 | ||
| 04/09/18 | The alliance reaches a population more than 1,000. | |
| December 2018 | ||
| 28/12/18 | The alliance reaches a population more than 5,000. | |
| January 2019 | ||
| 02/01/19 | Deletion of:akari. | |