Los Angeles, Jul 14 (IANS): Korean pop sensation BTS's Jung Kook launched his first major solo single, 'Seven', at the stroke on Friday morning, as promised, reports 'Variety'.

And it came with a surprise that was not promised: one of the hottest female rappers of our day, Latto, making a featured appearance on the track.

The lyrics talk about some hot action that is due to go down between the two, but the music, however high-energy, feels deeply chill. In other words, according to 'Variety', it feels designed to be a late entry in the "songs of the summer" derby.

In an email interview with 'Variety', Jung Kook acknowledges the summery vibe but sounds almost surprised to hear a hit-status projection for the tune, as if this crossed his mind about the Andrew Watt/Cirkut co-written and -produced track belatedly.

"I honestly didn't have a huge goal in mind, but since you said that, I'd be ecstatic if it becomes a 'hit'," he told 'Variety'.

Due to translation issues, with the singer (like most of his fellow BTS members) not having a complete command of English, Jung Kook did the interview with a translator sending his answers via email.

In it, according to 'Variety', he vows -- or at least hopes -- that the BTS ARMY can expect a full solo album before 2023 is up, without giving too much away about how much is already in the can and how much remains to be done.