On July 6, talent misono updated her official blog revealing that she has been suffering from insomnia and sensitivity to sound due to Meniere's disease. 

misono revealed that her symptoms of insomnia include "not feeling well-rested after a night's sleep," "waking up during the night," and "difficulty falling asleep." 

"Before, I used to wake up every hour, but now, I wake up every 10 minutes," she said. "I try to get in bed by midnight everyday, but I am unable to sleep until the sun comes up.... There are many days I'm unable to sleep by noon. I've quit sleeping," she continued. 

misono also revealed that she hasn't completely recovered from Meniere's disease, which she was diagnosed with in 2019. She said that sensitivity to sound is the most difficult symptom that she has to deal with.