Baki Gaiden - Retsu Kaioh Isekai Tensei Shitemo Ikkō Kamawan! - Vol. 3 Ch. 17 - A tsunami on land

[MangaDex]

 

[ngkn92]

hoh, so he wants to do that too. lol

 

[AlphraLoust]

Retsu using a goblin as nunchaku
This is the best isekai I've ever read