Lee Seung-gi is stepping back in with a powerful vocal transformation.

His label Big Planet Made Entertainment unveiled the music video teaser for the digital single I'm By Your Side on the 17th through official SNS channels.

The video shows Lee Seung-gi sprinting through a dimly lit alley, then belting out the song with a live band against the backdrop of city lights — hinting at the emotional weight of the new track.

I'm By Your Side is built on a full rock sound. The blend of explosive band instrumentation and Lee Seung-gi's soaring vocals delivers a deep, resonant intensity.

The lyrics carry a warm message of standing by someone through every difficult moment. Another new track, Goodbye, is also set for release.

Goodbye unfolds over a delicate guitar melody, capturing the ache of someone unable to say a final farewell to a loved one — a sentimental ballad with Lee Seung-gi's signature emotional depth.

Both songs reflect his artistic sincerity, with Lee Seung-gi directly involved in writing and composing.

The new release drops today at 6 p.m. on major music platforms.