South Korean boy group BTS has announced a comeback with a new single titled “Butter,” scheduled for release on May 21.

The announcement came Monday night after an hour-long ASMR video that featured a butter melting into a heart was posted on their official Youtube channel.

“Brimming with the inimitable charm of BTS, the new single ‘Butter’ will melt its way into the hearts of all ARMY (the global BTS fanbase). Dip into the sometimes smooth, other times charismatic enchantment of BTS with their latest music,” BigHit Music, the group’s label, said in a statement.

Big Hit said physical copies of the track would hit stores worldwide this summer.

“Butter” comes a month after the April 2 release of the boy group’s single “Film Out,” a Japanese soundtrack for the film “Signal.”

Smart Communications recently revealed the Grammy-nominated act as their new endorsers, headlining the telco’s “Live Smarter, Live With Purpose” ad campaign. Charlene Grace Lao