Every season of The On1y One ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of The On1y One!

Beginning: You’re Not My Brother

Closer: It’s Only 4 Lips Touching Together

Actually: We Can Give It a Go

Splendor: At the End of the World

Closed: Waiting for the Wind

Plan : When to Open for Business?

Belonging: Let’s Live on Campus

Sparkle: Teenagers

Naked: The Blossom of Youth

Thief: Who Crossed the Boundary?

Kiss: It’s Only 4 Lips Touching Together?

New Beginning: Pain is Necessary for Rebirth

When their parents marry, two high school students become stepbrothers and navigate their relationship, turning from enemies into something more special.

The Best Seasons of The On1y One

The Best Seasons of The On1y One

Season 1