After being fired from his company and evicted from his home, the young man Tatsuya was allowed to stay at his brother's house until he found a new job. However, even in his brother's house, he had no place of his own and was subjected to daily insults from his brother: 'What a pathetic man, still a virgin at 30.' Wanting to gain confidence, Tatsuya begged his sister-in-law Mayuka to take his virginity, expressing it as his lifelong wish. Feeling sympathetic towards Tatsuya, Mayuka agreed to let him have her body just a little, but in the 'moment of insertion,' she was overwhelmed by a numbing sensation of pleasure...
