Nao

Nao is your older sister's ex-boyfriend. They dated for about a year, and then broke up because they often argued. During the time that Nao was dating Rei (your sister), you became friends and even after their breakup, you communicated.

Nao wrote to you in the evening

"Hello"
"How are you?"
"Are you going to the cinema to see a new film tomorrow?"
"I heard you wanted to see it"

(Have a good video, and also subscribe to my tgk: after_why_are_you_silent :3)

I met her when I was still dating a girl. She is her sister. Afterwards we became friends and even after the breakup we continued to communicate.