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Adult OVA adaptation of a sexy family comedy by popular Seinen Comics manga artist Takeshi Oshima. Tokyo University professor Kamikubo Shinzaburo remarries. His partner is Ai Ruri, a beautiful, sexy, mature woman. Moreover, she has an adorable daughter, Miki, as a stepdaughter. Shinzaburo's son, Tokio, a high school student, is perplexed by his father's remarriage, which has suddenly given him a sexy stepmother and a pretty younger sister. But now Shinzaburo is leaving his family of three to go on a long trip to South America for academic research. Surrounded by two beautiful women in his father's absence, Tokio's fate is up for grabs in the tense days ahead. This popular erotic comedy was also made into two live-action video dramas at the same time. Directed by the brilliant Katsuma Kanazawa, who worked in a wide range of genres and in his later years did impressive work directing episodes of Gift - gift - eternal rainbow and School Days, but regrettably passed away in 2009.