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

The On1y One poster

The On1y One (2024)

★ 8.7/10 August 22, 2024 1 season

ComedyDrama

Creator: Mu Suli, Liu Kuang-Hui  ·  Writers: Wang Yu-chen, Liu Kuang-Hui

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

Where to watch

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Trailer

Creators

Mu Suli Mu Suli Liu Kuang-Hui Liu Kuang-Hui

Cast

Liu Dongqin Liu Dongqin Sheng Wang Benjamin Tsang Benjamin Tsang Jiang Tian Samuel Ku Samuel Ku Zhao Xi Kenny Yen Kenny Yen Lin Bei-ting Lu Tingyu Lu Tingyu Yang Jing 'Jenny' Duan Chun-hao Duan Chun-hao Sheng Ming-yang Jennifer Hong Jennifer Hong Jiang Ou Yu An-shun Yu An-shun Old Man Ding Chen Wei-min Chen Wei-min Mr. Zhao

User Reviews (2)

Dominic Kebre
Dominic Kebre April 6, 2026

When ”The On1y One” was announced and it was apparent that it was more or less another adaptation of the first ”Addicted” book, I wondered if the world really needed yet another series about stepbrothers. Well, maybe the world didn't really need this series, but unlike the Thai adaptation of ”Addicted”, which failed in every aspect, this one can compare to the groundbreaking series from mainland China. I would even say it is almost as good, and therefore I'm glad that it was actually made. Sheng Weng's (Liu Dong Qin) life changes completely when he not only has to change to a school where he meets introvert Jiang Tian (Benjamin Tsang), who also becomes his stepbrother when Sheng Weng's father marries Jiang Tian's mother, so that the boys have to live under the same roof. As would be expected from this kind of BL series, they move from enemies to friends, and from friends t…

kinrich30
kinrich30 August 29, 2026
★ 7/10

This is the story of two guys in their junior year of high school who end up as step-brothers and in time a more serious bond develops between them, which is slowly leading toward romance. A little spoiler ahead. The good, it is a well told story with several subplots and actually they have a straight best friend who adds a lot of humor to the series, I wish they had done more with him. Then there is end of episode 9 and if you know, you know - if you don't know, you should watch it. It is getting some flak due to the casting, the 2 main stars are supposed to be 17, but one is 30 and the other is 29 in real life when it was filmed (one has so much make up on to hide where he shaves you can see it caked on his face during most of the scenes), but the actors did an excellent job and they shouldn't be getting grief over that, if you can move past this you will enjoy it. The annoying, the se…