Based on Netorare Kanojo by Satou Toshio. Your girlfriend Akemi has brought two of her friends over to your place because one of them (Yamashita Kozue) was inquiring about your life, and wants to watch you and your girlfriend together. Their other friend (Miyajima Kakou) was dragged along, has no desire to be there, and is only there for emotional support for Yamashita...

"Class is about to start!"