NiziU's Korean debut, "Heartris," offers an engaging portrayal of high school romance with a touch of whimsy. The music video introduces a charismatic and handsome boy, none other than Felix from Stray Kids, in a high school setting.

The video begins with the boy's arrival at the school, instantly captivating the hearts of all the girls, depicted as falling in love with him, complete with heart symbols. This classic high school crush scenario initially sets the stage for what seems like a typical teen romance story.

The video stands out by blending elements of reality and fantasy, as both the NiziU members and Felix seamlessly transition into charming anime characters. This artistic choice adds an imaginative dimension, subtly blurring the lines between everyday life and a dreamlike world.

Towards the video's conclusion, an unexpected twist emerges, revealing that the girls' affections for the boy may not be as genuine as they initially appeared. Their true desire is not for his affection, but rather for his keychain. This humorous twist on the conventional high school crush scenario injects a dose of light-heartedness and cuteness into the video, highlighting the unpredictability of youthful infatuation.

In summary, NiziU's Korean debut music video, "Heartris," offers a heartwarming and entertaining glimpse into the world of high school romance. It combines elements of reality and fantasy with a clever and charming twist, making it an enjoyable and cute video to watch for fans of NiziU and those who appreciate endearing and fun narratives.