JYP Entertainment's girl group NiziU showcased a transformation from a sweet and charming image to a more distant and stylish look in a series of individual concept photos unveiled from March 21-22. The Japanese pop group is preparing for the launch of their 2nd Korean single, 'Love Line', which includes two tracks - the title song "Love Line" and "What If". This upcoming release will be NiziU's return to the Korean music scene after about a year and five months following their debut single, 'Press Play', and its lead track "Heartris". Fans can anticipate NiziU's fresh and candid expression in 'Love Line', set to be released on March 31 at 6 PM KST. A prologue video for the Korean comeback was also shared by NiziU, offering both a sweet and mysterious preview.