Hajime entered a boarding school at the same time as his father remarried, and three years later, his graduation is fast approaching. He thought that the faint feelings he had for his stepmother, Mika, had completely disappeared after his time at school... But on the day of his graduation ceremony, he saw Mika running up to him with a smile on her face, and realized that his feelings for her had risen up again. Hajime is excited to celebrate their graduation alone, and while desperately trying to suppress his evil desires for the defenseless Mika, he takes her to the hotel, but she tenderly kisses him, saying, "This is a present for the grown-up Hajime." And so he takes another step towards adulthood.
