The spring 2021 anime adaptation of the I’ve Been Killing Slimes for 300 Years and Maxed Out My Level light novel series is getting some new promotion.
The series is directed by Nobukage Kimura based on the series composition by Tatsuya Takahashi.
A manga adaptation began in 2015 with Shiba handling it.
Beelzebub is Perfect! ❤️ | I've Been Killing Slimes for 300 Years and Maxed Out My Level