Luna, who debuted at a young age, has many idol hoobaes who are older than her. She talked about how she took care of the other idols and some of the idols she discussed were Sunggyu and Dongwoo from INFINITE, Chen from EXO, and Kim Hyung Jun from SS501. 

Luna explained, "Sunggyu and Dongwoo's INFINITE activities would sometimes overlap with the musical practices. I would text them to update them what happened in the practice...Chen and I would almost live in the practice room, and the producer would kick us out and ask us to stop practicing so much." 

She also shared how she was able to have many conversations about the work with Kim Hyung Jun despite the big age gap. 

When asked to give any advice to future idols who want to try doing a musical, Luna responded, "I want to tell them to practice and prepare a lot. The same goes to idols who are sunbaes but will become hoobaes in the musical world. I also want to practice hard, take care of others, and help out the newbies like I was helped by the veterans."