TWICE successfully wrapped up its live Japanese online live "TWICE in Wonderland" at 7 pm on the 6th, and released a surprise video announcing the release of a new single at the end of the performance. Nayeon said, "The performance is over, but I will give you a big spoiler as I promise to meet you next time," and the following screen showed the phrase "TWICE Japan's 8th single album'Kura Kura' 2021.512 Revealed," which cheered the fans.

The single "Kura Kura," which was confirmed to be released on May 12, was written by JYP Entertainment's representative producer Park Jin-young. The moment he met his opponent, he expressed his feelings of falling deeper into his world as if he was enchanted, and TWICE is known to have included the ripening atmosphere of the members who are first shown in the Japanese album, raising expectations.