I've Been Killing Slimes for 300 Years and Maxed Out My Level - Season 1 - Eps 4: We Went to a Dragon's Wedding
Laika's older sister Leila is getting married, so Azusa and her friends set off to visit Mount Rokko, the home of the Red Dragons. The mountain is bustling with the many Red Dragons who have gathered for the ceremony. Azusa congratulates Leila and the ceremony carries on in peace... until the Blue Dragons, a tribe with a long-standing grudge against the Red Dragons, attack in full force!
About I've Been Killing Slimes for 300 Years and Maxed Out My Level

Title: I've Been Killing Slimes for 300 Years and Maxed Out My Level
First Air Date: 2021-04-10
Last Air Date: 2021-06-26
Status: Returning Series
Rating: 7.9/10 (from 208 votes)
Language: JA
Seasons: 2
Total Episodes: 13
Network: AT-X
Genres: Animation, Comedy, Sci-Fi & Fantasy
Production Companies: REVOROOT, Nippon Columbia, Hakuhodo DY Music & Pictures, SB Creative, BS11, STUDIO MAUSU, AT-X, THE KLOCKWORX, movic, DMM GAMES, Bushiroad, Medicos Entertainment, Square Enix
Synopsis
After dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99! All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points. Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!