ILLIT’s Yoona and Minju are making their OST debut for the KBS2 drama Last Summer. According to Hive Music Group’s Billie Lab, the OST titled Love Smile will be released at 6 PM on the 15th across major online music platforms.

Love Smile is described as a mid-tempo pop track that captures the fluttery feeling after falling in love and the earnestness to confess, delivered in bright, sweet vocals by Yoona and Minju. This marks the first time the two members release a song as a duo.

A teaser video released on the 14th previewed portions of the track, fueling fans’ excitement over the duo’s chemistry.