Raised by his mother, Natsumi, alone, the son, Hiroshi, harbored a secret love for her and wished 'to stay like this, just the two of us...'. However, unaware of Hiroshi's feelings, Natsumi began to get involved with a man from her workplace, saying 'it's time for me to find my own happiness.' Suppressing his jealousy, Hiroshi forced a smile as he sent her off on dates, but his heart remained unsettled. That night, he woke up suddenly to find Natsumi and the man entwined in his home. After spending a sleepless night in shock, Hiroshi called Natsumi to his room the next morning...
