Okay.... so we got a 30 something office Japanese employee who randomly met a bold and slightly shameless JK on a train? This sounds like a typical plot in a H_tai show bruh. I don't know if there is a story, the chapters are just the two talking about normal things from water bottles to hot weather. There is some humor with random office workers on the train expressing their jealousy towards the male MC or so. I can't be too attached though, it was axed at chapter 10 and it's kinda..obvious why. You aren't missing anything by not reading this series bruh