Seo Si Hoo

Name: Seo Si Hoo
Native name: 서시후
Also Known as: Heemin, 서성욱, Sihoo, 시후, Seo Seong Uk, Seo Si U
Nationality: South Korean
Gender: Male
Born: October 29, 1998
Age: 28

Seo Seong Wook, known professionally as Seo Si Hoo, is a South Korean singer, dancer, model and member of BE:MAX (비:맥스, formerly known as MUSTB).

Before debuting, he was a dancer at 1Million Studio and was a backup dancer for a few of BTS's music videos.

He made his debut in January 2019 as the group's main vocalist, main dancer and maknae with their single album, "I Want U".

The group faced changes almost immediately when, in April 2019, 4 out of the 7 members, their manager and a company executive suffered a serious car accident on their way back to Seoul. The manager was killed instantly, and 2 members suffered from mental anxiety and shock and decided to leave the group.

In November 2023, MustM Entertainment (머스트 엔터테인먼트) announced his contract would not be renewed and MUSTB disbanded. He spent time as a freelance model.

In July 2024, KPlus Entertainment (KPLUS 엔터테인먼트) and Team Otter decided to bring the group back, re-branding them as BE:MAX. They re-debuted with the single album, "Down Down".

(Source: kisskh) Edit Biography

Year	Title	#	Role	Rating
2024	Re:Born Japanese TV Show, 2024, 10 eps [Contestant / BE:MAX] (Regular Member)	10	[Contestant / BE:MAX] Regular Member	6.6
2022	Secret Airlines Korean TV Show, 2022, 21 eps (Ep. 10) (Guest)	21	(Ep. 10) Guest	0.0
1998	Pops in Seoul Korean TV Show, 1998, 6000 eps (Ep. 4275) (Guest)	6000	(Ep. 4275) Guest	7.9

Yim Si Wan & Seorina star in ‘Love in Disguise’, a K-Drama Where a Crossdressing Detective Goes Undercover as Her Rich Murder Suspect's Bodyguard!

Editorials - Oct 19, 2026

Prime Video's 'Love in Disguise' follows detective Kang Jae-hee as she disguises herself as a male bodyguard to investigate a wealthy heir in a murder case!