Simulate living together with your sister!
It's all up to you to choose whether to spoil her, take care of her, and what kind of sex you want to have with her!
With tap actions, you can stroke her head, talk to her, touch her, and enjoy her reactions.
At the end of the day, of course, there are things that lovers do together...
There are six rules that were established so that humans and yokai can co-exist:
You must never harm a human.
You must never show your true form to a human.
You must obey the laws that humans have made.
You must never enchant a human.
You must never have children with a human.
You must never bring a human into yokai territory.
The Minatsuki family has existed peacefully in the human world and has prospered by obeying these rules. This is a story about Airo, the only daughter of the head of the Minatsuki family, the Minatsuki family butler, Raito, and the head maid, Fuuka.
Contrary Airo can't honestly express her feelings and bosses people around. Fuuka has a stiff exterior but can't help teasing whenever she sees an opportunity. This is how they spent their peaceful, everyday life.
One day an incident occurs in the town where they live. Onizou Mitsuki, the head of the household, asks Raito and Fuuka to protect Airo. The two of them must now stay by her side day and night. They accompany her, not just inside of the mansion, but at school as well.
There is a dormitory at a private school for training high-class ladies, where students are trained secretly 'To Serve Men'.
However, one of the students got pregnant during the training.
To prevent this from becoming a scandal, the pregnant student was expelled and the dormitory was shut down in fear of causing another incident. Many years passed and now the decaying building is awaiting demolition.
The protagonist, the bastard child of the accidental pregnancy, negotiates with the current principal of the school using the story he heard from his mother.
He negotiates to reopen the dormitory, and work there as a manager.
He only has one goal in mind.
To drain the slaves he has raised and taste their milk.
So the dormitory known as the 'Mistress Administration Building' has been revived by the protagonist. The building will be transformed into the 'Slave Management Building; where the sounds of schoolgirls being trained and milked will echo throughout the night.
In the residential district Kamiitsukomachi's old shopping district lies Hibikino Shop. This general store closed down after the grandfather owning it finally retired.
His three granddaughters, attached to it, and unwilling to let it disappear, decided to renovate it.
Hibikino Shop, loved by its community since 50 years, under the pressure of Yukari, the good for nothing of an eldest sister, became... an eroge store!
Hibikino Shop finally reopened.
A store of this size being too much for only three sisters to handle, and with only Yukari to know about this peculiar kind of products, they asked the second daughter's childhood friend Kurama Ren, our hero, to help them, as a part-time worker.
This is a story about the eroge industry from the perspective of a salesclerk.
Minase ── an isolated island due to its poor accessibility. However, the protagonist used to go there a lot in his childhood.
After entering medical school, his parents were worried about him losing his edge due to the daily study schedule. They wanted to refresh him. The protagonist comes to the island again after being advised to visit his cousins during his summer vacation. He remembers his childhood with them, and being treated like a real family member.
Suiren was beautiful when she was a child, and she was very kind and was like a real sister to him. Shion was like a tomboy little sister and used to follow him around.
The protagonist wonders how the two of them have grown up. He can hear their voices afar from their house. Upon his arrival, he reunited with the two grown-up sisters.
Suiren has become a gorgeous woman with a beautiful feminine body overflowing with tolerance and kindness. Shion, who has grown into a pretty girl, has a somewhat disgruntled look and only talks to the bare minimum necessary.
An older sister who never changes and a younger sister who has changed. Feeling puzzled, as recommended by Suiren, who seems to have been waiting for the main character, the protagonist stay at their house for a while.
How will he spend his time with them on the island under the summer sun?