SE

Oka Shirou, a 22-year-old Computer Science student, spends his final day at university attempting to approach a girl he frequently sees on the train reading programming books. In an awkward moment, he accidentally knocks her bag, spilling its contents, including a sex sleeve. The girl takes the item and runs away, visibly upset. Determined to move on, Oka shifts focus to his new job as a System Engineer. However, fate brings him into contact with the same girl again, setting the stage for further unexpected developments.