K-pop boy band TVXQ recently renewed its contract with S.M. Entertainment, an industry source said Tuesday.

The renewal went smoothly based on long-standing mutual trust between the artists and the company, the source told Yonhap News Agency.

For their first project after the contract renewal, the duo is expected to drop a new album next month.

Boy band TVXQ poses for the camera during a comeback press conference at Hotel Silla in Seoul on Aug. 21, 2017. (Yonhap)

One of K-pop's first-generation boy bands, the group returned to the K-pop scene last year after finishing mandatory military conscription.

In November, the duo rewrote Japanese Oricon music chart history by having six albums hit the top of the weekly chart, a first by any foreign artist group. "FINE COLLECTION～Begin Again～" became their latest album to rank first on the weekly chart. The duo's previous five albums -- "Best Selection 2010," "Tone" in 2011, "Time" in 2013 and "Tree" and "With" in 2014 -- also topped the chart.

In June, TVXQ will hold a concert at International Stadium Yokohama, also known as Nissan Stadium.

Boy band TVXQ poses for the camera during a comeback press conference at Hotel Silla in Seoul on Aug. 21, 2017. (Yonhap)