[6][7] In November 2011, Hong was invited by director Kim Dong-yeon to try out for a role in his new musical, Coffee Prince 1st Store, which was based on a popular tv drama with the same name.

However, the musical's storyline focused more closely on the original source material, a novel by Lee Seon-mi, and centered around the romance between Choi Han-gyeol and Go Eun-chan.

[a] It tells the story of singer-songwriter Yoo Jae-min and his lover, aspiring writer Jeong Da-jeong, and explores the question of whether the memories of their love would be bittersweet like wine.

Hong starred as Jeong Da-jeong both in the demonstration performance in February, and reprised her role in the re-staged production at the Daemyung Cultural Factory (DCF) Hall 2 in Daehak-ro from March to April, 2015.

Hong shared the dual lead role of Chae-kyung and Sa-rang with two other musical actresses, Song Sang-eun [ko] and Shin Ui-jeong, who were part of the original cast from the premiere in 2014, which marked the 10th anniversary of the Ganda Theater Company.

[17] In the same year, Hong took on the role of Mariko in the play "Round Trip Letter," which was based on the 2010 novel "Ōfuku Shokan" (往復書簡) by Japanese author Minato Kanae.

Directed by Kim Myung-hwan, the play tells the story of longtime lovers Junichi and Mariko, who met as classmates in middle school.

Junichi leaves for volunteer work on a remote island in the South Pacific with limited electricity, and the couple communicates through letters.

Hong and actress Lee Ji-hae were double-cast in the role of Mariko, and they acted opposite Park Si-beom, Kang Jung-woo, and Son Yoo-dong, who were triple-cast as Junichi.

The play also featured Son Seong-min, Byun Hyo-joon, Choi Seok-jin, and Park Hee-jeong in various supporting roles that help reveal the truth hidden between the two lovers.

Written by Choi Eun-i and Min Jun-ho of Ganda Theater Company, the story was based on folktale Princess Pyeonggang and On Dal.

Directed by Son Hee-song, the film tells the story of the three daughters of Ms. Jo, Su-yeon, Ji-yeon, and So-yeon, who lead busy lives, and who return to their hometown upon hearing the news that their mother is dying.

The play was first selected as one of the works for the "Performance, Meet - Accompany" project in 2016, which was a content development support initiative for the second anniversary of the opening of the Daemyung Cultural Factory.

In 2021, Hong's portrayal as Yoo Cho-hee, a teacher at Cheongjin Elementary School, in tvN drama series Hometown Cha-Cha-Cha, was received well by viewers.