It was announced that an unaired thirteenth episode will be bundled with the eighth manga volume of Hatsukoi Monster (First Love Monster), which will be released on February 7, 2017. The new cast members for that episode have also been announced.
Shigeru Roland Yamada: Tomoaki Maeno (Fukigen na Mononokean)
Ikoka Kaneko: Yoshitsugu Matsuoka (Days (TV))
Namiko Kaneko: Satsuki Yukino (Genshiken)
Hatsukoi Monster started its serialization in ARIA by Akira Hiyoshimaru in 2013. There are currently seven volumes released, where latest volume went on sale on July 22, 2016. A 12-episode TV anime adaptation by Studio Deen is currently airing.
Source: Official site
Hatsukoi Monster OVA on MAL
Manga 'Hatsukoi Monster' to Bundle Unaired Episode
It was announced that an unaired thirteenth episode will be bundled with the eighth manga volume of Hatsukoi Monster (First Love Monster), which will be released on February 7, 2017. The new cast members for that episode have also been announced. Shigeru Roland Yamada: Tomoaki Ma...
10 years ago

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