Souboutei Kowasubeshi - Vol. 16 Ch. 158 - Where Are You Hiding?

[MangaDex]

 

[Kendama]

I hope Kurenai puts on some clothes soon, otherwise the ecchi tag crowd won't give up.

 

[thegoatrider]

I dont get how people can say its ecchi when its barely drawn to be sexual

 

[Iiiik]

I dont get how people can say its ecchi when its barely drawn to be sexual

Because some people believe that everything nudity-related HAS to be ecchi.
Ecchi is litteraly a genre with specific tropes and such, in Souboutei, nudity is exploited in the context of modelling which is a common occurence in art.
It's just basic confusion, but the intent is purely different.