"Hey Haruto, let's break up." My childhood friend, whom I started dating upon entering high school, abruptly ended things with me.

Upon hearing her explanation, I learned that my childhood friend had been cheating with an upperclassman, and she wanted to break up because she'd started dating him.

Plunged into the depths of despair, I became a living corpse in my sorrow, but that sorrow eventually transformed into rage.

Swearing revenge on my childhood friend and the upperclassman, I approached the upperclassman's ex-girlfriend and proposed we take revenge together, but she dismissed my planned method as being too naive...

...convinced that true revenge lay in "us, the discarded ones, appearing genuinely happy."

And so, to needle the upperclassman and my childhood friend, we decided to act as fake lovers...