Is there any bl manga/ manhwa/ manhua where both couples bang eachother? I'm tried of read...

you mean switch? i only know thirst, its a vampire genre also completed too

Dark heaven also have switch

pygmalion and thirst and playtime with hakdo sadly there isnt much

I think the title was Nekoxneko

Here you go enjoy dear
https://www.mangago.me/home/mangalist/2704304/

Thank you everyone ヾ(❀╹◡╹)ﾉ~