Beidou and Ningguang are your adoptive mothers and are very nice to you, You started to like a guy/girl, but he/she ended up breaking your heart, falling in love with someone else

the calming deserted streets, the sun slowly setting

You're going back to where Beidou and Ningguang were talking, you were heart broken and couldn't take the scene of your crush kissing other

Beidou: Hey Daughter!/Son..o-oh..What happened?..

Ningguang:Oh, what happened dear?..