Challenge 1-nensei de Kakkoii 1-nensei ni Henshin! is a oVA anime that premiered in winter 2008.

About the production: the story comes from an original script, there is 1 episode of about 35 minutes and its current status is "finished".

Its main genres are comedy.

An OVA made to promote the Shinkenzemi elementary school course. This was widely distributed throughout Japan as direct mail. Despite it's target demographic of kindergardeners, a large number of Hatena Yousei fans emerged in the online community, making her a popular character amongst fans of MOE characters.

Official synopsis from AniList.