This is the summer sensation that’s equal parts singing and slaying. Canadian film director Maggie Kang taps into her Korean heritage with collaborator Chris Appelhans, best known as an American illustrator, to co-direct and write the musical fantasy Kpop Demon Hunters (B), an engaging and culturally rooted film about a trio of female singers who moonlight as monster assassins. The high production value style is inspired by the look and feel of large-scale concerts, promotional videos and globetrotting adventures with pop music sensations, blended seamlessly with aspects of mythology and demonology for equal parts authentic action. Arden Cho as lead vocalist of the fictional group Huntr/x, Ji-Young Yoo as the rapper/lyricist/knife specialist of the girl-group and May Hong as the rebellious dance lead are among the fresh voice talent delivering funny, contemporary dialogue and music, with assist from contemporaries such as the band Twice and veterans such as crooner Lea Salonga, plus Ken Jeong and Daniel Dae Kim, as agent and doctor, respectively. Ahn Hyo-seop also shines as the lead singer of a mischievous rival boy band, flanked by sly sidekicks: a grinning tiger and a cute bird with a hat The score composed by Brazilian pianist Marcelo Zarvos adds to the kinetic, electric atmosphere with a bevy of international talents contributing to bangers such as “Golden,” “Takedown,” “Soda Pop” and “Your Idol,” keeping audiences humming in sassy syncopation. Although it drags a little in the final act, the film is mainly breezy and exciting with infectious catchiness and colors. It is more finely and winningly observed than expected; and it’s no wonder this Netflix discovery has inspired sing-along cinema screenings.