In a surprise announcement late Sunday night, the five-piece boy band unveiled the second poster for its year-end fan meeting later this month.

In the promotional poster for the event “Forever” scheduled for Dec. 30, and 31, members of the group cracked a grin as they posed in unison crossing their legs.

Sporting tartan tops in matching colors, all members decided to opt for dark pleated trousers coupled with a pair of black boots, a fitting look for the cold weather South Korea has experienced over the few weeks.

(Woollim Entertainment)

Ticket sales began earlier this month but all seats were reportedly sold out in a matter of minutes.

The two-day events will take place at Hwajung Gymnasium in northwestern Seoul at 6 p.m. on Dec. 30 and 10 p.m. the next day.

The second day of the event is set to spill over into the next day, giving fans a rare chance to spend the early hours of New Year’s Day with the group.

By Yim Hyun-su (hyunsu@heraldcorp.com)