Can the three tenors of China singers of iu do it? Who can protect her (good day) and give a video (audio) link.
Good days are actually difficult to sing, and there are few covers. So far, I have seen two, but all of them are multi-chorus, and all three high notes pass by without success.
It's really hard to sing as sweet as IU, but it's not annoying and uncomfortable.
IU's "Good Day" also chose "Men hate songs sung by women in KTV" because, you know, it's too ugly.