There’s a reason why “Limitless,” the title track of the eight-member K-pop group ATEEZ’s second Japanese release, sounds like an emotive, high-energy anime theme song: It was originally created to intro the series Duel Masters WIN. The song has a cyberpunk industrial synth that blasts off in the chorus and shifts with rap-rock verses and a brief a cappella from the group’s lead vocalist, San. On the other side is “DIAMOND,” which has a plucky emo guitar riff and glossy harmonies that highlight the group’s vocal line.