The season when flowers and grass begin to bud. Hina, who had returned to her father's family home, was witnessed one day by her uncles while indulging in masturbation, which sparked the beginning of a promiscuous relationship with them. Hina, who knew absolutely nothing about the basics of sex, was bewildered by her uncles' persistent caresses, yet unable to resist the pleasure, she gradually transformed into a sex slave, doing exactly as she was told. Eventually, she stopped going to school and spent all her time exploring every sexual limit with her uncles, and inside Hina's belly...