If you overuse your throat, like singing in a loud voice, the vocal cords may caught inflammation and it'd be difficult to even make a sound. As much as possible, refrain from vocalization, avoid stimulants, and take care of your throat.
Aimi
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Tae Hanazono (voice)
Rimi Nishimoto
Rimi Ushigome (voice)
Ayaka Ohashi
Saaya Yamabuki (voice)
Ayasa Ito
Arisa Ichigaya (voice)
Ami Maeshima
Aya Maruyama (voice)
Ari Ozawa
Hina Hikawa (voice)
Sumire Uesaka
Chisato Shirasagi (voice)
Ikumi Nakagami
Maya Yamato (voice)
Sawako Hata
Eve Wakamiya (voice)
Haruka Kudou
Sayo Hikawa (voice)
Yuki Nakashima
Lisa Imai (voice)
Megu Sakuragawa
Ako Udagawa (voice)
Kanon Shizaki
Rinko Shirokane (voice)
Miku Ito
Kokoro Tsurumaki (voice)
Azusa Tadokoro
Kaoru Seta (voice)
Yu-ri Yoshida
Hagumi Kitazawa (voice)
Moe Toyota
Kanon Matsubara (voice)
Tomoyo Kurosawa
Misaki Okusawa (voice)
Ayane Sakura
Ran Mitake (voice)
Sachika Misawa
Moca Aoba (voice)
Emiri Kato
Himari Uehara (voice)
Yoko Hikasa
Tomoe Udagawa (voice)
Hisako Kanemoto
Tsugumi Hazawa (voice)