6, a visual teaser for "Amazing -Bad Lady-" was uploaded onto their official YouTube channel followed by a music video teaser on April 14. Their comeback was initially scheduled for April 21 but was delayed out of respect for the victims and families of the Sewol Ferry accident.

On May 12, a teaser for ZEDD was uploaded to their official YouTube channel. On May 29, Cross Gene returned to Hong Kong to perform for ATV's 50th Anniversary Special. They also held a second fan meeting and performance at the Dragon Centre in Hong Kong.

Cross Gene had their first Korean comeback on June 9 following a nearly 2-year absence by releasing their "Amazing -Bad Lady-" digital single. However, Chinese member Casper was missing from all related promotions after suffering ahip/lower back injury. On June 26, Cross Gene released a music video for the Korean version of "Shooting Star." On June 28, Cross Gene held their 4th Japanese Live Amazing de SHOW at Differ Ariake Arena in Tokyo. Casper also performed. Additionally, the full trailer for ZEDD was uploaded to their official YouTube channel. Another show, Cross Show: ZEDD, was announced for October.

During July and August, Cross Gene participated extensively in the Japanese summer music festivals including opening for Amuse BBQ 2014, performing at Summer Sonic in Osaka, and performing as the opening act for Asia Departure on A-Nation Island. Japanese member Takuya also joined Korean television show "Non Summit" on JTBC as the representative for Japan.

On September 10, Cross Gene released the music video for "Billion Dolla"