Damn... she knew it was unfair but went for it anyways. Even if Yuno is aware that Tsumugi hates the thread it gotta hurt a lot to be rejected like that, mostly after not sleeping for being excited about her.
Now, its obvious red team might win but after hearing Tsumugi wish i dont think Yuno will be thrilled to ask something in return.
Tbh, considering the plot, it'll be a while to Tsumugi change her mind and will definitely have more frustrating things to come.
I just wish Tsumugi would simply ask Yuno why she likes her, since its obvious that is for reasons long before the thread appeared. But only we know that since not even Yuno was aware of it.