If 7 days have passed since you left, you may rejoin with the same account and play.
However, cannot rejoin during the 7 days after you leave as it is the retraction period. Instead, you may retract your decision via the pop-up window that appears when running the game.
You can rejoin after the retraction period has passed.

Please note that leaving Homerun Clash 2: Legends Derby will result in the termination of all of your gameplay progress and items.