There is No Problem with the Youth Under the Snow

No matter when, Yukinoshita Yukino is always implementing herself, even if she always looks up at the starry sky alone, she will walk on her own path without hesitation and resolutely, maybe no one knows what the final answer is, Yubi Yui Hama's inner decision?
The reason for Shiyu of Kasumigaoka's action?Why did Erily Sawamura choose?They were just looking for that thing called "the real thing," which would form and sprout under the snow.