Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita is a Japanese light novel series written by Morita Kisetsu-Sensei. It was serialized online on the user-generated novel publishing website Shōsetsuka ni Narō (Let’s Become a Novelist), then the comics were released. Then a manga adaptation was also debuted at Gangan Online website. It’s been drawing so much attention.

As for comics, over 1.5 million copies have been issued as of January 2021. As for the original novel, 15 volumes have been released. And for the manga series, 7 volumes have been released.

The story is set in the modern world in Japan. There is a hardworking woman.

She is 27-year-old, overworking in her life. She sacrifices everything of her life such as love or friends. She has even worked for 50-straight-day before. One day, she becomes unconscious while working.

When she wakes up, there is a girl in front of her.

And she realizes that she has died and the girl is an angel. The angel sympathizes her dying so young and says she will accept her request if she has any specific place where she can reincarnate to!

While being stunned…… she asks the angels to give her an immortal life without getting old. She also asks the angle that she wants to spend her days stress-free and as pleasantly as possible, eking out a living by hunting down the easiest targets.

The angel willingly accepts that request! The angel even makes her a young and cute girl, and decides the place she will reincarnate to! When she wakes up……

She finds herself in the plateau, spreading across the land with refreshing wind.

It looks like the angel carefully listens to her request and even offers her an abandoned house, which she can use freely. There is a village crossby so she has no problems getting food and stuff. She looks like a young girl…… Yeah! She has actually had an immortal life without getting old.

Appriciating the angel’s generous work, a reborn girl, named Azusa, decides to go shopping. Then a little slime popps out from the ground!

It looks like the slime likes to fight, slowly getting closer to her……!

Yes, it’s the different world! Azusa takes a sword out to fight against it……!

After fighting against each other so hard, Azusa ends up beating the slime. Even if it’s the different world, she appreciates the slime which sacrificed its life, and swears that she will not waste anything.

The village cross-by is very peaceful. She registers the adventurer, guild, on that day.

This is how Azusa’s stress-free life has started.

She won’t work too hard but will take care of herself and do what she wants to do.

Still, she needs a daily routine, so she defeats 20 slimes a day, while making money doing that. She lives so peacefully, enjoying his second life and……

300 years later, Azusa’s level has got a “kansuto”.
（* It’s an abbreviation of “countstop.” It means she reached the maximum level.）

She didn’t intend to have worked hard for 300 years but before she notices, she has become a legendary witch by selling her hand-made medicine, making use of her innate knowledge of herbs, or saving villagers by curing epidemic disease with recovery magic……!

The villagers get so excited to know that Azusa’s level has become incredibly high! However, Azusa has a feeling that she might be involved with troubles if people find out that her status is high. So, she asks them not to tell that to anybody. (The status is one of the private info in the first place, though……)

However……

A couple days later, a party of the brave heart visit her……

A couple more days later, a dragon who can talk visit her too!

The rumor about her as a witch has been spreading throughout the world and her excellent talent has now been known to many more people!

What is Azusa’s slow life going to be like? What will the strongest witch, Azusa, do!?