Shine is the in-house guitar and bass brand of Saein Musical Instrument Co., Ltd., a Korean manufacturer founded in 1991 and headquartered in the Namdong Industrial Complex in Incheon, South Korea. Saein's primary business is OEM production for established names such as Epiphone, Ibanez, B.C. Rich and Peavey, with manufacturing split between its Korean facility and a second factory opened in Gaomi City, China in 2001. The Shine label gives the company an outlet for instruments built and sold under its own name, drawing on the same factories that supply the larger brands.

The lineup leans toward affordable takes on familiar designs, including solid-body electrics, semi-hollows and bass guitars. Models like the SIL-510, a semi-hollow with a PRS-leaning outline, basswood body and figured maple top, and the HS-943, an Olympic white archtop fitted with a Bigsby tailpiece and Grover tuners, are typical of the range. Korean-built examples are generally regarded by owners as solid value, while later Chinese production sits at a lower price tier.

Shine instruments have circulated mainly through European and Asian retail channels rather than enjoying a high-profile artist roster, and the brand is best known among players as a budget alternative associated with the wider OEM ecosystem of Korean guitar building.

Shine has 4 products cataloged on Equipboard, including Steel-string Acoustic Guitars, Semi-Hollowbody Electric Guitars, and Drum Sets. Their gear is featured by 2 artists, with the strongest followings in Rock, Electronic, and Metal. Notable users include Andrew Wetzel and Angelo Parente.