Tona-gura! - S01

Kazuki has waited 10 years for the day her neighbors move back into their old house. She has a crush on Yuuji, her first love, though she never managed to tell him how she felt before they moved away. When they were kids, Yuuji often came over to play with Kazuki, her older sister Hatsune, and Yuuji's sister Marie. Her ideal image of Yuuji is shattered when he turns out to be more than she expected, acting all ecchi during their reunion. With their parents away in South America, both families have to learn to live together and rekindle the childhood feelings they shared. Things get even crazier when they attend the same school.