One day, while testing out his new video camera on a bridge in town, Kaito Kirishima sees a bright blue light in the sky and is inexplicably knocked over the side, awakening the next morning in bed with no memory of the event. But upon heading to school, the boy notices a new face that’s familiar to him somehow - her name is Ichika Takatsuki, and she’s new in town. Kaito’s friends, noticing his interest in the girl, all resolve to make a movie this summer and cast her as the lead, to which she immediately approves. Now, the group embarks on what will be a truly memorable summer that no one will forget, as Kaito and Ichika slowly, and clumsily, begin to fall in love.
Maiku Kamishiro has always had a photo of himself as a child in front of an old house with a young girl. One day after spotting the building in a news report, the high school boy moves to the countryside to live in the house from the picture. While living alone, making ends meet by working as a freelance programmer, Maiku gets the shock of his life when not one, but two girls turn up on his doorstep claiming to be his twin sister! With the lively Miina and timid Karen both possessing the same photograph, the pair begins living with the confused Maiku as they try to figure out which one of them is actually his sister.
In terms of style and storytelling, as well as much of the basic plot, Ano Natsu is a close cousin of the Onegai series (both Teacher and Twins). Many of the characters bear a strong resemblance, in terms of design and personality, and the conflicts that carry the story are much the same. It's safe to say that, if you enjoyed the Onegai series, you will enjoy Ano Natsu, and vice versa.
Sorata Kanda has a real problem - he just can't say no to the cute face of a kitten! However, his lovely strays have finally landed him in trouble, as his dorm doesn't allow keeping pets. Given an ultimatum to get rid of the cats or move out, Sorata makes the mistake of standing up for himself and finds himself exiled to Sakurasou, the home of misfits the school doesn't know what to do with. Yet the more he spends time there, Sorata sees they all have their own incredible talents. None, however, enthralls him more than the latest arrival: Mashiro Shiina, a world class artist who is seemingly incapable of feeding or clothing herself! Since none of the other residents have a shred of responsibility, the onus of 'Mashiro Duty' falls to Sorata; what will become of Sorata and his latest stray, and will he ever achieve his goal of escaping Sakurasou?
Both shows are high school romcoms revolving around a group of friends. In both series the characters are trying to accomplish something (in case of Ano Natsu de Matteru a movie and in case of Sakurasou no Pet na Kanojo a game or at least in the first half of the series). Obviously there is romance, drama, comedy and some love polygons going on. If you watched one and liked it, the other one is not that much different, so odds are, you could like it.
One day a light descends from the sky and splits into the ideal girls of Takeru and Ryou. That is where this gentle and vaguely romantic story about our ugly and beautiful world begins. Soon enough the story plummets into the secrets of global extinction and the meaning of life. Everything in this world that is beautiful has something ugly in it, and that ugliness is part of the secret of its beauty. Even for romance this is true...