It was the end of the year.
As usual, the main character, Yasuto, who came to a doujinshi sale by himself, happened to meet a girl classmate, Rina Kadokura, at the cosplay space.
Although they both have otaku hobbies, they quickly hit it off because they didn’t have anyone close to them to talk to.
With that as an opportunity, the relationship between the two of them progressed rapidly.