According to Dream Earth Company, an album distributor of TOMORROW X TOGETHER, the pre-order volume of'minisode1: Blue Hour' surpassed 300,000 copies on October 5. This is the number of domestic and overseas pre-orders for about two weeks from September 21, when pre-orders began, and is a new record of TOMORROW X TOGETHER.

This third mini album ‘minisode1: Blue Hour’ is a story told by the five members after the ‘MAGIC’ series before moving on to the next series.