This debut single showcases Irene & Seulgi's sophisticated vocal and performance skills, offering a sleek, R&B-infused pop sound that contrasted with Red Velvet's typical releases.
- The single "Monster" was released on July 6, 2020, through SM Entertainment. It peaked at number 4 on the Gaon Digital Chart and number 7 on the Billboard World Digital Song Sales chart. The EP of the same name also achieved commercial success, topping charts in several countries.
- The music video for "Monster," released the same day as the single, features elaborate choreography and striking visuals. It quickly garnered millions of views, highlighting the subunit's strong visual concept.
- "Monster" was noted for its dark, intense atmosphere and bold production, setting a distinct tone for the Irene & Seulgi subunit. The track was praised for its vocal harmonies and the members' charismatic delivery.
Irene & Seulgi are the first subunit of the South Korean girl group Red Velvet, formed by SM Entertainment in 2020. They debuted with a focus on a more mature concept, distinguishing themselves from the group's main activities.
Tracklist
