Reiko is not my real mother. When I was a student, my father remarried and my new mother was Reiko. My father died soon after they got married and she raised me, a non-blood related girl, as if I was her real mother. Every day I spent time with Reiko and I admired her and at the same time, I was in love with her. I wanted to make Reiko happy in place of my father... but that was all shattered by my best friend, Takumi. He approached her pretending to be uninterested, and while I was away, he extended an unfaithful hand to Reiko...