All I remember about them is that they debuted between 2017-2019 and in the promo shots they were in body bags in a forest
Unfortunatelly it’s not them
If I remember correctly Doku used a picture of them in bodybags but I don’t remember a forest.
Another band using a forest but not with bodybags is Mathilda for their release 少女A(※17才)
That’s all I remember now.
I think you mean ウラモノ (uramono) which later renamed themselve to ツミト (Tsumito)
I haven´t heard any songs of them though
I just went digging for them out of curiosity and they apparently disbanded already.
Oh thank you this was it!