That ending was wtf. Was it a one-night stand? Did they get together? It feels like an entire page is missing, even though it's not. What a sad trash end to an otherwise superb vanilla story.
It's always a tad bizarre when people reading a story intended for adults cannot infer what happened afterwards like an adult could. Yes! They get together afterwards. The arc of the story is Sagata starts setting her life in motion. She becomes honest with the guy she likes, plans to get her neck tattoo removed (tattoos are taboo in Japan for the most part), and is testing for employment. After a romantic night, she starts making better decisions. That's it. That's the story. Also piercings and fucking.