T☆ine! (てぃ☆イン!) is the odorite duo of Fine (ファイン) and Turu-T (つるてぃ). They are well-known for their snappy and witty choreography. They started in 2011 and are now considered an inseparable team. In 2017 they created an idol group called cosmic!! that is now under DD Inc. On October 25, 2020 it was announced that Fine would be going on hiatus due to health concerns.

Fine is considered the "Leader of T☆ine!" and is responsible for the choreography. While Turu-T is called the "Glasses of T☆ine!". Fine is always on the right side of the screen and Turu-T on the left.

Although each of them has their own Mylists, their dances are uploaded by Fine. Their choreography can also easily be danced in solo because they are often just a mirror of each other. T☆ine!, however, almost never dance solo.

Their first dance cover was in 2010, however in mid 2011 they deleted all their previous videos. Their first dance cover after that was their original choreography to "Twinkle" , which became popular and reached more than 100k views.

By 2012, their dance cover for the short version of "Tell Your World" became their most iconic dance cover, reaching 700k+ views and stayed in the Odottemita Ranking for months. Although they never posted a full version of the dance, other odorite were influenced to perform full versions with their own interpretation. However, in spring 2014, T☆ine! collaborated with the American odorite duo Ari 。Ki to perform a full, 4 person version of "Tell Your World" live at Cho Party 3.

T☆ine! also frequently collaborates with Melochin. Their collaboration videos usually become viral, especially their choreography of "Mousou Zei," which reached the No. 1 spot in the Odottemita Ranking in 2013.