A short Studio 4°C action-ONA-cum-commercial from November 1, 2016. It promotes the [Japan Kanji Aptitude Test](https://en.wikipedia.org/wiki/Kanji_kentei), which is also called the KanKen (漢検) for short. Includes English and Japanese subs. For more information, please see [this blog post](https://magaifansubs.wordpress.com/2016/11/14/chiryokumaru/).