Yosuga no sora

I fell in love with Nao Yorihime.

This anime is based on a Hentai PC game.
The story does not form continually but has various endings depending on the heroine.
It is a heartrending story but in any event, very Hentai.

Suddenly losing their parents, Haruka Kasugano and Sora Kasugano who are twins move to the country side surrounded by mountains.
Here, Haruka finds out who is the most important person in his life.

The story takes place in a small town called Okusome-Chou.  This town does not exist but it is said that Kabasaki-Chou in Tochigi-Prefecture is the model.

Nazo no Kanojo X (Mysterious Girlfriend X)

I fell in love with Mikoto Urabe.

This is the first 'Drool' love comedy ever created.

It sounds hentai that the two are tied firmly by bonds with their drool.
But their romantic relationship is unexpectedly heartwarming that the two deeply understand each other by licking their drool.
The story mostly shows Urabe Mikoto's fetishism and gradually feels attractive and before you know it, can't get your eyes off her.

This story takes place some where in Tokyo Japan.
There is no place such as 'Kazami-dai' station but from the Summer Greeting Card that Akira sends to Mikoto, the address is some where in Musashino-City Tokyo.