“Tell me what you wanna do,” Cookiee Kawaii sings, dreamily, as if she’s crooning long distance through a rotary phone. “I know you see I’m feelin’ you.” It could be the start of slow-burning love ...

Theatrical Japanese pop-metal wunderkinds Babymetal, who deftly walk the line between kawaii and kvlt, are readying themselves for their first full-on headlining North American tour. And hold the fuck ...