Junya and Sanae are an innocent couple who have just started dating. - Everything is going well, today is the first night and the first time! - ? - … Just as she was in high spirits, she was told by Junya that she could not have sex. - She doesn't ask why, and although she's uncomfortable, she goes to the same bed with her, but Sanae wants to sleep with her at the very least. - Then, something incredibly hard and big hits her waist...! - ?