Ghost Town no Hana (2009)

Ghost Town no Hana 2009 / ゴーストタウンの花 2009 / Flowers of Ghost Town

The story is set in a failing new town, where a high school girl lives poorly with her father, his second wife, and the wife's two children. Through a friend, she meets a top-notch student and begins dating, but lacking in experience, she seeks advice from an otaku whose specialty is dating sim games