<p>Kippei Katakura is a 17-year-old playboy who spends his time chasing girls, careless of their feelings. But when his 5-year-old cousin Yuzuyu comes to live with his family after her mother's sudden disappearance, Kippei is put in charg..
<p>Kippei is busy trying to become Kokoro's boyfriend and slips back into his irresponsible ways. He oversleeps and doesn't have time to make Yuzuyu's lunch. Even worse, he spends an afternoon with Kokoro, forgetting to pick up Yu..
<p>A stranger is seen lurking around in the kindergarten, and Kippei is asked to investigate, When he finds the stranger, he recognizes his Aunt Miyako - Yuzuyu's momma! Kippei confronts Miyako and learns why she left Yuzuyu in the care o..
<p>Yuzuyu has a new classmate, Aya, whose older sister takes care of her just like Kippei takes care of Yuzuyu. Unfortunately, Aya and Yuzu overhear Aya's sister complain to Kippei about having to take care of a small child. Kippei starts..
<p>Kippei finds a photo of Yuzuyu's mother in the wastebasket. When Kippei shows the photo to Yuzuyu, asking her if she threw the picture of her mother away, Yuzuyu doesn't remember. In fact, Yuzuyu doesn't even know who the woman..