Responses
The animation you saw probably was the trailer for the remake of the manga Hana no Akuta, the same one to wich these characters belong, the remake is titled "Hana no Akuta:re;bloom".
OMG YESSSS THANK YOU AAAAAA
IT IS THE ONE I SAW
I feel like I saw an animation on twt that featured the characters here and I genuinely can't remember/tell if this is it or it's another story