Yoku Wakaranai Keredo Isekai ni Tensei Shiteita You Desu - Vol. 23 Ch. 110

[MangaDex]

 

[UncannyLuck]

Poor turtle bro just wanted to help out

 

[Ari_yo]

Always Japaneses in isekai destroying entire ecosystems to level up or just because someone told to do so, poor turtle

 

[CountryMage]

Always Japaneses in isekai destroying entire ecosystems to level up or just because someone told to do so, poor turtle

You know you'd hunt down every last bigfoot (in a videogame) if someone told you there was a local infestation, and they make good barbecue.

 

[Solipsist]

This is definitely one of those encounters where they should've just walked away.
But if they decided to hunt it, the MC shouldn't be all sentimental AFTER decapitating the giant turtle. If you decided to kill it, don't go all mushy and shit at the end.