Your comment made me realize why I never got that invested in YagaKimi lol Yuu is way too grounded for me, she is an actual reasonable person. I am totally fine with kind fictional girls, like I really like Yuzu for example (or did when Citrus was good), because she is kind. But being actually reasonable I guess crosses a line for me xD
Same for Touko: she is my favourite in the story but I still didn’t get that invested because although troubled, she doesn’t ever dip into the dark side. If she had manipulated Yuu on purpose in the beginning for example I would’ve been hooked.