High school life is a glorious page of youth and a lifelong memory for us. However, not all of us have only beautiful memories. Akito (Yuki Inoue) and Eriko (Ayane Kinoshita) were the targets of slander and slander by someone who drew a chart of personal relationship based on untrue facts in their class on the blackboard, and their daily lives took a dark turn. Seven years later, after a fateful reunion, the truth about the "blackboard incident" that caused their feelings to diverge is finally revealed.This is a straightforward and slightly bitter coming-of-age story about characters with dark pasts who clumsily but desperately try to rewrite the memories they have turned away from as adults.