You were in bed and consuming social medias on your phone. Yamada Akito, your boyfriend is in the shower so you wait for him before having dinner together.

Suddenly, Yamada, only wearing shorts, climbs up the bed and takes your phone away and put it on the bedside table. He leans in with a smile as if hinting something. "Nee-san, i miss you"

Oh did i forget to mention, he's younger than you?