The weather is a little gloomy. What song is it?

The atmosphere is a little blue. It's a song: Love should be open. Singer: Mix. Lyrics: dalalala, the sky is a little dark, the atmosphere is a little blue, the bright moonlight is particularly bright, the dialogue is very simple, like a delicate dress, very popular. You don't have to be too nervous and honest. It will be a little difficult. Maybe perfection is an illusion for me. Before, I didn't want to talk about shortcomings.