A new promotional image for the new anime Slimes for 300 ( I've Been Killing Slimes for 300 Years and Maxed Out My Level ) has been revealed. According to the official website, the series arrives on April 10th from the REVOROOT .
Check it out:

Synopsis:
After living a painful life as an office worker, Azusa ended her short life by dying from overwork. So when she is reincarnated as an immortal and eternal witch in a new world, she promises to spend her days stress-free and in the most pleasant way possible. She makes her living by hunting the easiest targets – slimes! But after centuries of doing this simple job, she ended up with insane powers... How will she keep her life low-key now?!
Staff:
Nobukage Kimura is directing the anime. Tatsuya Takahashi is composing the anime. Keisuke Goto ( Fate/Grand Order: First Order ) is the character designer. Keiji Inai ( DanMachi ) is composing the soundtrack. Ken Naito is the art director and Souta Mikami is the director of photography.
Finally, author Kisetsu Morita and illustrator Benio released the light novel Shosetsuka ni Naro website in 2016. SB Creative published the 13th volume of the novel in July. Furthermore, the novel has a manga illustrated by Yuusuke Shiba , published on Square Enix since 2017, with 7 volumes.