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About The On1y One

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

The On1y One runs for 1 season, created by Mu Suli and Liu Kuang-Hui. Every episode page keeps the show's order, so you can watch from the pilot to the finale without hunting for the next link. Episodes are bought individually for 1 credit.

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Episodes

Season 1 · 12 episodes

01

Beginning: You’re Not My Brother

When Sheng Wang unexpectedly becomes Jiang Tian's stepbrother and classmate, both of their lives are suddenly thrown into disarray.

2024-08-22 49m★ 9.2Now playing
03

Actually: We Can Give It a Go

Sheng Wang's attitude towards his stepmom drives a rift between him and Jiang Tian, but an impulsive night out brings them closer.

2024-08-28 56m★ 9.6
04

Splendor: At the End of the World

From home to school, Sheng Wang and Jiang Tian learn to cherish each other's support and company. Meanwhile, tender feelings begin to emerge.

2024-08-29 57m★ 9.7
05

Closed: Waiting for the Wind

After discovering that someone beat up his bullies, Sheng Wang is caught off guard by Jiang Tian's abrupt decision to move away.

2024-09-04 54m★ 9.7
06

Plan : When to Open for Business?

A parent–teacher meeting becomes a burden for Sheng Wang and Jiang Tian. Later, teachers summon them both to face their bullies.

2024-09-05 51m★ 10.0
07

Belonging: Let’s Live on Campus

Sheng Wang learns more about Jiang Tian's childhood during a lunch break. Worried about Sheng Wang's absence, Jiang Tian skips class to track him down.

2024-09-11 47m★ 9.8
08

Sparkle: Teenagers

Sheng Wang's wish to move out of the house takes his family by surprise. Now officially roommates, he and Jiang Tian brace for a new chapter together.

2024-09-12 48m★ 9.7
09

Naked: The Blossom of Youth

Sheng Wang and Jiang Tian deliver impressive performances during their school's field day — until an unexpected injury lands one of them in trouble.

2024-09-18 50m★ 9.8
10

Thief: Who Crossed the Boundary?

A sprained ankle forces Sheng Wang to temporarily return home. Just as he sneaks back to his dorm, an intruder appears and causes chaos. Jenny Yang starts to have a crush on Lin Bei Ting.

2024-09-19 53m★ 9.8

The On1y One FAQ

How much does it cost to watch The On1y One?

Episodes cost 1 credit each. Credits are $1 each, so a full season costs the number of episodes in credits. Each episode you unlock stays in your account permanently.

Do I need an account to watch The On1y One?

Yes. Create an account and add credits before unlocking an episode. Signing up is free and only needs an email and password.

How many seasons of The On1y One are there?

The On1y One has 1 season on Cineby, with 12 episodes in total. Start with season 1 below.

Where should I start watching The On1y One?

Start with season 1, episode 1. The episode list on this page keeps the order, and the player moves to the next episode when one ends.

Can I watch The On1y One with subtitles on my phone?

Yes. The player includes a CC menu where available, and the whole site is built for mobile. Fullscreen and picture-in-picture are supported.

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