There are at least 3 artists with the name Tei...

(1)
Kim Ho Kyung (simply known as Tei, born April 4, 1983) is a Korean pop singer.
Tei was born in Ulsan, South Korea. Park Kyung Jun of Kiss Creative Group discovered him while searching through a Korean karaoke website for new talent. Before being discovered Tei wanted to be an architect and studied at Gyeongnam University.

His debut album titled The First Journey was released in 2004. The first single, "And Love Leaves a Scent" soon became his first number one hit. Tei's second album UcuPraCacia was released in 2005. Ucupracacia is the name of an imaginary plant in a novel by Kim Ha-in which dies when touched, but revives after the same person falls in love and caresses it. It reflects Tei’s wishes for his fans’ continuous love after his first album sold 110,000 copies.

(2)
Tei is a band from The Netherlands. It gathered for the recording of the selftitled album, an ode to Thei Neutelings (the grandfather of the leadsinger of the band). The lyrics of the songs on the album "Tei" are based on the poetry of Thei.
The band released the album early 1997 at own expenses.
Unfortunately nothing has been heard from Tei after the album.

(3)
丁-tei-/Tei Hinoto is a Japanese singer and harpist, she has released covers on her YouTube channel using the harp. Her song 'Because' was used as the end theme to the anime "The Weakest Tamer Began a Journey to Pick Up Trash'. Little is known about her personal life. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.