A family just moved in next door.

The main character cannot help but be curious about the beautiful mother Naoko and daughter Erina.

After witness Naoko's shower, his thoughts become worse.

But Naoko is a married woman, and also much older than himself.

Although he is worried, they still meet each other everyday since they are neighbors, and become closer.

Helping with physical works, being invited for meals, and even looking over her daughter's studies.

The opportunity to go to her house also increase, the relationship deepens...!?

After that, what kind of "relationship" is it will be left to your choice!