(2013), School OZ Hologram Musical (2014), In the Heights (2015–2016), Rebecca (2017), Rudolf (The Last Kiss) (2017–2018), Autant en emporte le vent (Gone with The Wind) (2018), Mamma Mia!

She also appeared as a regular cast member on the reality shows Strong Girls (2017), The Suitcase Man (2017), The Taming of the Shrew 2 (2017), Beauty Code (2017), and Dressing Table 3 (2017–2018).

[8] Later that year, Luna recorded the song "Let's Go" alongside labelmates Sungmin, Seohyun, and Jonghyun, for the purpose of increasing public participation in the 2010 G-20 Seoul summit.

[13] Luna was cast in the TV Chosun drama entitled Saving Mrs. Go Bong-shil as Seo In-young, a college student and youngest daughter of the title character, which first aired in December 2011.

She also recorded duets with Super Junior members Ryeowook for the musical, and Kyuhyun for The Croods soundtrack, as well as solo single "U+Me" which was used as the theme song for the game Softmax TalesWeaver.

[17] Luna also starred as Diana in SM Entertainment's first hologram musical School OZ, alongside labelmates Changmin, Key, Suho, Xiumin, and Seulgi.

[21] Luna released the digital single "Don't Cry For Me", a remake of Lee Eun Ha's hit song from 1986, on May 10, to thank her fans and viewers of King of Masked Singer for supporting her during her run in the program.

[22] She also took part in the Anh Chi Hwan special for Immortal Song 2, and showcased her powerful singing ability with her cover of the classic hit "Salt Doll".

[23] In July 2015, it was announced that Luna would star as Nina Rosario in the Korean production of the Broadway musical In The Heights,[24] which began in September of that year and came to a close in November.

At the end of the year, she collaborated with Ailee, Apink's Eun-ji & Mamamoo's Solar at the 2015 SBS Gayo Daejun to perform a cover of Jinju's "I'm Okay" for the Limited Edition I - Diva Together section of the show, on December 27.

[30] On October 2, 2016, Luna released another collaborative single with Amber, featuring Ferry Corsten and Kago Pengchi, as part of SM Station, titled "Heartbeat".

[32] On December 30, Luna collaborated with Yesung, Sunny, Red Velvet's Seulgi and Wendy, NCT's Taeil and Doyoung, and Lee Dong-woo, on "Sound of Your Heart", SM Station's final song of 2016.

[33]In January 2017, it was confirmed that Luna was cast to star in the food variety show Strong Girls, alongside Park Bo-ram, Fiestar's Cao Lu, Young-ji, and Giant Pink.

[38] On May 30, 2017, it was announced that Luna would be starring in the 2017 South Korean musical production of Rebecca, alongside Shin Young-sook, Jung Young-ju, Kim Sun-young, and Lee Sang-hyun, with performances expected to begin in August.

[44] On February 9, 2018, Luna collaborated with Heda, a winner of "everysing" app, as part of SM Station project, to re-release a duet version of "Free Somebody".

[60] In October 2011, it was confirmed that Luna had been accepted at Chung-Ang University's Institute of the Arts as a theater major through a special rolling admissions screening process.