SiAM&POPTUNe is a Japanese female idol group affiliated with Flying Penguin Records. The members were made up of members from the Japanese entertainment agency Theatre Academy.The group was formed on September 10, 2013 and made its stage debut on September 22, 2013. The five members are Hina Yoshino (born June 15, 1997), Mizuki Tokuyama (born March 8, 1992), Mi Kaoru Endo (born November 2, 2001), Mizuki Kobayashi (born May 25, 2001), and Kotone Masuda (born March 15, 2004). They made their CD debut with the release of "Carnival"; in 2014, they released their 2nd single "Movin'on Mirai" and 3rd single "Heroine Kakumei"; in 2015, they released their 4th single "Tsugi x Hagi Maker" and 5th single "Natsu ni Koishite"; on October 26, 2016 Their first album "TUNe UP!" was released in September 2017, and the 6th single "Bring me!", the last single, was released in September 2017. On December 30, 2017, SiAM&POPTUNe held "SiAM & POPTUNe activity suspension & Yurika Noro, Kazusa Miyashita graduation live". With this live, SiAM&POPTUNe stopped their activities. In 2018, during the hiatus, Hina Yoshino graduated from the group on March 10 with "Hina Yoshino Graduation Performance", Mizuki Tokuyama graduated from the group on June 3 with the performance of "Living Room", followed by Mi Kaoru Endo on June 17 with "Mi Kaoru Endo Mizuki Kobayashi graduated from the group in November 2018. Kotone Masuda, the last member of the group, graduated from the group on April 7, 2019 with the "Kotone Masuda Graduation Event".