We do know the crytsals reside in the blood as well as their clumps(be it external or internal),and that getting it can be through cuts,punctures,swallowed,and even breathed in.
But can spread through bites?,and more significantly,can it act like a STD?
^ Kiara actually wished a happy birthday to Pomu, one of the NijiEN members on Twitter, but yea just give it time they literally only debuted 2 months ago and look how long it took for a non hololive vtuber colab from HoloEN
^ Finana was in chat during Reine's keyboard review stream, which she noticed. I think a lot of them follow each other on Twitter too, hopefully it's only a matter of time before we get some cross-company EN collabs
The series has always been a blend of wholesome and ecchi, it can be very lewd when it wants to be but also very sweet and wholesome at other times, sometimes both at once. I think the blend is balanced well, so even as a manga reader I personally don't think Iruru takes away or ruins the wholesomeness. I also think there's some interesting aspects to her character, plus the dynamic between these three is still there and wholesome as always.