In a seaside town where very little happens, middle school students Keisuke Isobe and Koume Satou live a rather dull life. But when Koume's crush breaks her heart, their situation becomes quite unordinary. She starts a "no-strings-attached" relationship with Keisuke, whom she had previously rejected, both finding solace in the other in order to fill the emotional voids in their lives. However, being "friends with benefits" becomes complicated when real feelings begin to develop, as the consequences of their relationship start to take their toll on those around them and themselves. A Girl on the Shore takes a harsh look at love, relationships, and the emotional price that will be paid as the result of a decision made between two teenagers.
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A rampage at a university, the students Yuka and Mai are frozen with fear. At gunpoint, the two perpetrators try to force them to decide which of them must die next. In a moment of distraction, Mai tries to escape but is badly injured by a shot in the back. After the killers have moved on, a student, Hayashi Yuka, comes to the rescue. But even as they try to save Mai together, the killers return. Hayashi is driven to an act of desperation that leaves him with deep wounds.
