Soushi Souai: Junai Mellow yori  

窓視相愛 ~純愛メロウより~, Pure Mellow Love

It seems like Asuka has been engaging in online sexual activity with someone she grew up with, named Ryou. However, she's concerned because it appears that he hasn't recognized who she is yet. This realization comes when he accidentally reveals his feelings towards her during their virtual interaction.