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Artist's commentary
Junior is Kizuna Akari-san
It's a new publication coming out at the event called VoiceConnect.
Official site→http://voiceconnect.tokyo/#/
Online ordering is also available, best regards.
Melonbooks→https://www.melonbooks.co.jp/detail/detail.php?product_id=697482
By the way, the contents of this image is something like Akari-chan being challenged to a game where where you touch the lips with your finger after saying something.