The motto of the sharehouse Komarisou is "everyone is like family".

The current lodgers are male students Mamoru and Hayato.
The landlady is Sadako. Not living in the sharehouse but helping is
a married woman named Akina.

Akina is the object of many fantasies for the healthy students.
As a married woman and a mother, she's the perfect idea of a lover
and a matron. Mamoru and Hayato see her as a pure flower.

It's been about a year at Komarisou, and spring is here.
Things are starting to show that nobody's seen before.

[From DLsite English]