I've Been Killing Slimes for 300 Years and Maxed Out My Level, Vol. 5 (manga)
Available for back-order
Aaaaand the secret to Falfa’s slimy condition is…she slept wrong! Good news—she can be fixed. Bad news? Only the famous slime martial artist, Fighsly, knows how! And so, Azusa’s gotta fight Fighsly…without magic! Can she pull it off?