I’ve been killing slimes for 300 years and maxed out my abilities
- Cosy
- Adventures
- Fantasy
- Magic
Didn’t I say to make my abilities average
- Cosy
- Adventures
- Fantasy
- Magic
- The totally Normal Average Miles
Kuma kuma kuma bear
- Cosy
- Adventures
- Fantasy
- Magic
- All the bears
By the grace of gods
- Cosy
- Adventures
- Fantasy
- All the slime you could need
In the land of Leadale
- Cosy? (The story and characters are 100% cosy, but if you think about her circumstances it is a bit melancholy)
- Adventures
- Fantasy
- Magic
- The most over the top elf son
Konosuba
- Cosy?
- Adventures
- Fantasy
- Magic
Ascendance of a bookworm
- Cosy? (I would say it’s very cosy but there are a few bits which are a bit melancholy)
- Adventures? (No adventurers guild or actual adventuring, but the MC has a goal and is working toward something which makes it feel like they are adventuring)
- Fantasy
- Magic? (There is magic in the world but you don’t see much until the end of the 3rd season, there should be lots more in the next season)
- No.1 Super mega monster bookworm
But Ascendance of a bookworm is an amazing story I think it fits the criteria
Beast tamer
- Cosy (Mostly cosy, some more serious confrontations)
- Adventures
- Fantasy
- Magic
Banished from the hero’s party: I decided to live a quiet life in the countryside
- Cosy (Mostly cosy, some more serious bits and a bit of melancholy)
- Adventures
- Fantasy
- Magic
TsukiMichi Moonlit Fantasy
- Cosy? (The relationship between the MCs is cosy but it can take more serious themes and moments including war / killing people. But there is an underlying comedy aspect? )
- Adventures
- Fantasy
- Magic
- Includes best Dragon samurai , Devouring Spider , Human Lich
So I’m a spider so what?
- Cosy? (fairly cosy, Lovable non-human MC tying to survive, some more serious parts but the MC is always upbeat and doing their best)
- Adventures
- Fantasy
- Magic
- Best parallel minds
That time I got reincarnated as a slime
- Cosy (Mostly cosy, some more serious buts including war and a fair few battles. But the MC and their friends are wholesome)
- Adventures
- Fantasy
- Magic
The weakest tamer began a journey to pick up trash
- Cosy (Mostly cosy, some more serious bits including kidnapping and MC background is melancholy. But the story as a whole is cosy)
- Adventures
- Fantasy
- Magic
Reborn as a vending machine now I wonder the dungeon
- Cosy
- Adventures
- Fantasy
- Magic
- You will either enjoy it or hate it
I haven’t read the light novels but I think the first season ends at the end of the second volume as the penultimate chapter is “Balsam and Woodsorre”.
There are 12 English translated and 15 Japanese novels so based on the first season, season 2 may cover volumes 3 + 4 leaving 5-12?
https://en.m.wikipedia.org/wiki/The_Apothecary_Diaries