The Night Is Short, Walk on Girl (2017) online

The story of the titular girl known only as "Otome" and her insanely long night of partying and drinking-complete with a book fair, festival, and many adventures in between. It is also the story of "Senpai," her upper class man who has been attempting to get closer to her by "coincidentally" running into her again and again. However, on this night, meeting up with her may be the greatest challenge of his life.