It is always hard to comeback after a big hit.
Same here for Sunmi, after the enormous success of her last year Gashina, coming back after that, it is a huge thing as everyone will be waiting for something at the same level of creation and formated in the same way.
Courageous. “Heroine” is something radically different. But as creative as is it, it will serve as a transition to her next songs. And we will need time to adapt to what is apparently a varied range of style.
If you expected something very commercial, something as Gashina, like I was (wrongly), you’ll be surprise. Heroine is a bit weird, in its pure artistic expression.
But I have to concede that I respect her, for not doing what people are logically waiting for, and to impose her own taste and creativity.