The Morning Calm Post

Five-member band Splayit, known as a "school band" from Mnet's Steel Heart Club, releases its debut single SPLAY : CHAPTER 01 at 6 p.m. on August 13, 2026, Korea time. Lee Mujin's production team Chorok Bottle Headquarters participated in the title track Last Train, while members Yoonchan and Kyungwook are credited in the composition of the double title track Domino.

Splayit is preparing for its official debut. The group will release its debut single SPLAY : CHAPTER 01 through music platforms at 6 p.m. on August 13, 2026, Korea time. Splayit is a five-member band made up of vocalist Yoonchan, drummer Eunbin, keyboardist Kyungwook, guitarist Aiden and bassist Eunchan. The members first became known to the public as a "school band" on Mnet's music variety program Steel Heart Club. The teamwork and band format they showed on the program created a base of interest before debut. Still, appearing on a program and making an official debut are different things. If the show was the starting point that introduced the team, this single is the first record that will show what color Splayit intends to carry in the actual music market.

The team name Splayit has been introduced as a combination of Splay and Play it. It contains both the meaning of spreading something out and the act of playing music, showing the group's direction of unfolding each member's personality and passion through sound. For a rookie band name, it is relatively direct. Rather than locking the team's identity into one genre or concept, it places performance and expression itself at the front.

The debut single SPLAY : CHAPTER 01 contains three tracks. The double title tracks are Last Train and Domino, joined by the B-side Celebration. According to reports, Last Train has been introduced as a song built around a refreshing band sound and bright energy. The track involves Chorok Bottle Headquarters, the production team led by Lee Mujin. Lee Mujin is a singer-songwriter with broad public recognition. The fact that his production team participated in a rookie band's debut title track is an important element in explaining Splayit's initial musical color.

The point to watch here is less Lee Mujin's name value and more the role of the song. A debut song is like the first sentence that explains a team. For a rookie group, the first title track is not only about digital chart performance. It also becomes a reference point for what kind of sound the team will build going forward. Since Last Train has been introduced as a song led by a refreshing band sound, Splayit appears to have chosen a bright and expandable band texture for its first activities rather than a dark or heavy mood. That direction does not sharply depart from the "school band" image formed through the broadcast.

Member participation is confirmed on the double title track Domino. Reports said Yoonchan, Kyungwook and album producer NV1 took part in the composition. This is an important detail in an article about a rookie band. For a band-format group, not only vocals and performance but also playing, ensemble work and participation in songwriting can become elements that build trust in the team. Of course, it is too early to define the members' creative ability based on one debut single. Still, the inclusion of member composition credits on the debut record explains that Splayit has a direction of showing self-driven musicianship as a performance-based team. Celebration is placed as the album's third track. Based only on currently released reports, it is difficult to judge the song's detailed genre or message.

Another point to examine in this debut is where a rookie band-format team stands inside K-pop. The domestic idol market has long moved around dance performance. Still, band-format teams have continued to exist. DAY6, Xdinary Heroes and ONEWE have each combined band sound with K-pop fandom grammar in different ways. Splayit begins within that flow, but its starting route is slightly different because it first passed through the broadcast narrative of Steel Heart Club. A show can quickly present a team's characters and relationships, but after debut, the music and stage must carry that impression forward.

The "school band" label in particular has both advantages and homework. The advantage is clear. For a rookie team, it can communicate familiarity and a growth narrative relatively easily. After the official debut, however, the group needs to move beyond its broadcast image and show its substance through records and performances. The fact that Splayit's first single is titled CHAPTER 01 connects naturally to that point. This album is better understood as the first page of a continuing team narrative than as a fully completed result.

The role of the agency and production team is also part of the story. Multiple reports introduced Splayit's debut single alongside press images provided by LM Entertainment and Kakao Entertainment. For a rookie band to enter the music market, not only music production but also content distribution, video production, broadcast activities and online fan communication need to move together. For a band-format team in particular, actual playing scenes and live stages may have a strong effect on public evaluation. How music shows, live content, short-form videos and performance-based content are arranged after debut can become a point of continued attention.

Splayit's debut is not simply the arrival of one more rookie team. It is the process of a group first introduced through television releasing an actual record and entering the K-pop market with a band-format lineup. How the debut songs balance the broadcast image with musical completeness, and how the members' playing and creative participation expand from here, will become clearer through this first round of activities.

Summary Points

• Splayit is a five-member rookie band known as a "school band" from Mnet's Steel Heart Club.
• The debut single SPLAY : CHAPTER 01 will be released at 6 p.m. on August 13, 2026, Korea time.
• The album includes three songs: double title tracks Last Train and Domino, plus the B-side Celebration.
• Lee Mujin's production team Chorok Bottle Headquarters participated in Last Train.
• Members Yoonchan and Kyungwook, along with producer NV1, are reported to have participated in composing Domino.