At first, I thought this was really dumb and didn't like it, but now that I think about it more...
It's kinda like Traffic Lights, but Tenko would be okay with me also dating Kaede.
I don't know how Tenko feels about Kaede, but she's not a boy, so I think it's okay.
It's like the ultimate ship where everyone is happy and gets what they want. (Except Kaede, but honestly Shuichi doesn't deserve her so this would probably be even better)
8/10
Thanks again to LeopardLovingBooks for suggesting this. I'm fine with rating poly ship if anyone suggests them. This one actually isn't that bad, and I've never thought about it before. I do agree with what I wrote up there roleplaying as Himiko. So I think it's a 6/10. What do you think of it?