While on a field trip to London, Nagai Towa gets lost in the city at night.
After he finally makes it to the train station, he finds a mysterious egg.
"What's with this egg? It's really pretty..."
And then right before his eyes, the egg shatters into pieces. His consciousness fades away...
When he comes to his senses, he finds himself standing in an unfamiliar place. It has the appearance of London, but it's a completely different world.
----Royal Capital Salem
There, he meets a girl named Shelly Linestad who is searching for her father who has been accused of murdering the king.
For the sake of returning to his original world and helping the girl who helped him...
He continues pressing on while wearing the Dragon Armor "Clarias", and at the same time gets ever closer to the truth hidden within this new world.
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.
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?
They say I'm a guy who doesn't understand human emotions at all.
But really, who actually does?
The start of summer:
Aiuchi Shuuta, a second year at Hokumakidai Academy, is the smartest student in his grade. However, he loses this title for the first time.
A girl, Arimura Romi, climbed her way to the top, while continuing to publish cutting-edge research papers online. She's a very mysterious girl: the textbook definition of an enigma.
And thus, Shuuta seeks Romi's help on a certain matter.
"Aiuchi Shuuta" and "Arimura Romi"
It all started from the meeting of these two geniuses-- a distant summer adventure begins.
Touko was taken into custody on suspicion of committing murder and testified that she was the culprit. However, she was subsequently released due to insufficient evidence. The general public did not approve of this, so she ended up being imprisoned in a large mansion.
Youta was once saved by Touko when he was young, and he decided to live with her in the mansion after his grandmother passed away, leaving him all alone. They were joined by Touko’s friend Mion, the class rep Yoru, and their eccentric classmate Izuru. He felt that it was a pleasant life, cooking together, chatting about random things and having the occasional argument.
But who is the true culprit? And why did Touko confess to the crime? Can the caged girl be saved?
"1920 ...?"
Tsukasa Kazami, a young man who lives in 2020, sees himself travel back in time 100 years ago after sitting under acherry tree.
-- Tokyo, the Imperial Capital. Full of hopes for the future, it's a brilliant romantic city where the flowers of culture are in full bloom.
"Elementary, Tsukasa. The last thing left is always the truth."
A mysterious British woman who runs a detective agency alone in the imperial capital.
Under her lack of money, Tsukasa is involved in numerous incidents ...?
"--Now, let's find out the answer".
Which era will awaken his true potential, Reiwa or Taisho? The curtain of this retro mystery among cherry blossoms lifts!
All of humanity has come to share the same dreams.
Some nights, a tale of adultery between a teacher and his student.
Other nights, a romance between a commoner playwright and a noblewoman actress.
Yet other nights, a story of burgeoning love between a truant young man and a teacher-in-training.
Again and again people see these same three dreams.
Why does everyone now endlessly experience these dreams?
This is the story of the girl who's called the world.
