VOISPER confessed their love on the January 20 installment of 'Immortal Song'.
For the 'Rising Stars' special, VOISPER covered Shin Hyo Bum's 1993 hit track "You Are the One I Love". The members expressed, "We want to create a satisfying performance and take the title of '2018 Super Rookies'."
Their competitor Min Woo Hyuk commented, "I realized how beautiful their four voices are."
VOISPER were able to win one round, but it was Kim Yong Jin who took the final win.