Troubleshooter or Resolver (Korean: 해결사; Haegyeolsa) was Shinhwa's debut album. It was released on May 9, 1998 and became quite popular among the fans. The boy band was first seen performing on KM Music Tank with their first song, "Haegyeolsa" (Resolver). The song grew to be popular and reached a few number one on some chart. Their second single from the album was "Eusha, Eusha". Because "Eusha, Eusha" was a lighter song in comparison to Resolver, which was a dark mood song, and climbed up the chart quickly. However, around the same time, a water accident had occurred on a beach, causing people to use the song, "Eusha, Eusha", as a reminder of the accident, despite it being a happy, light-hearted song. Quickly, Shinhwa move to their third single, "Sharing Forever", which charted fairly well as well.

Information is adapted from the liner notes of Resolver:

Shinhwa's music video for their three albums can be seen contrasting each other. In the music video "Resolver" (Korean: 해결사; Haegyeolsa), Shinhwa can be seen wearing matching shiny yellow outfits, dancing on a swing-like platform. The storyline that follows the music video cane be link to the American movie, Terminator, with Seoul, South Korea being destroyed by a huge blast of fire. A girl can be seen in the music video, walking with a guy following her. As the music video continues, the guy shows the girl various clips of pictures from the holocaust to even Marilyn Monroe.

In contrast to their first single, Shinhwa's "Eusha! Eusha!" (Korean: 으싸! 으싸!), which was a remake of Manfred Mann's song "Doo Wa Diddy", was a bouncy song, with the members dressing in white and blue costumes. They also filmed the music video near a beach as well, with the members dressing in the Los Angeles Lakers Uniforms with Kobe Bryant's jersey #8. "Eusha! Eusha!" became Shinhwa's first bubblegum pop song, with the members showing a different side to them in the music video, from jumping around to playing in the water.

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