Osanazuma ga Tsukushite Kureru no

One day a doll you purchased suddenly became a life-size
autonomously moving doll. She says she will soon return to
being a normal doll without periodic provision of your lifeforce,
so she makes an offer to be your wife.

Considering that pushing her out of your home is
too cruel, you start living together with the doll.

How to treat the doll girl is totally up to you.
She accepts everything you request.

[From DLsite English]