The protagonist, Dale, went to the cursed forest to learn more about the reasons of arising disease that spread in the neighboring village. During his search he meets a squirrel-girl who warns Dale about danger. She advises him to leave the forest before night falls, otherwise he will share the fate of the dryads. But it was too late… You can try to set the forest free of the curse and follow the way of light or you can obey the will of corruption… If your heart is opened for romance, you will have a chance to find a very exotic soulmate during your travels around the mysterious forest. Your soulmate will keep you a company during your stay in the gloomy forest.
Koga Michiru is a newly enrolled first-year student at a boarding academy with a notably large clock tower located deep in the mountains. Unfortunately, on his first day, he gets caught up in some sudden trouble and accidentally breaks an expensive-looking statue. In order to compensate for the broken statue, the principal orders him and the boy who caused the incident to work for the academy’s “Bureau for the Investigation of Special Affairs.” When they arrive at the Bureau’s headquarters, a room situated in the academy’s enormous underground library, a girl is waiting for them there with an apathetic look on her face. The girl informs the confused pair of the situation: Magic exists in this academy. When the clock tower chimes, the “Realm of Night” appears, and merges with the academy building. The Bureau’s job is to take care of the supernatural problems that arise. And so, Koga struggles to protect the academy from troublesome magical items known as “Mists”…
In a fantasy world where magic exists, the demon realm faced an unprecedented danger. Three “witches of disaster” appeared and invaded the demon country of Saarland. Due to the recent peaceful times, Saarland lacked the skills to protect the territory of Groesen. Recognizing the witches’ overwhelming powers, such as the ability to change the form of others, they surrendered the territory to them. Half a year later, the majority of the townspeople in Groesen had been turned into dolls. Wilfred decided to take back the land from the witches, and he possesses the only ability to defeat them.
Hidekazu Akechi is a 2nd-year student at Sakurahane Academy. He lives with his father but spends most of his time alone as his father is usually away on business. His mother passed away when he was younger. As spring rolls around, the falling of cherry blossoms can be seen all over the school but he pays no heed to it. His childhood friend and neighbor, fellow 2nd-year student Kana Mebusaki, however, loves the scenery and tells him that it’s spring is a time for new beginnings. Kana is fairly energetic but is a bit of an airhead. The next day, Hidekazu oversleeps and is running late for school when he meets Kotomi Garei, the class president. She’s particularly notable at the school since she’s a first-year student and it’s fairly rare to see first-year students running for student council. Word is that she is so focused on her work that she hasn’t had time to recruit other students to join the student council. Kotomi lectures Hidekazu for being late and struggles to close the school gate. Hidekazu steps in to help her close it and for that act of kindness she looks the other way and lets him off. In the library, Hidekazu sees a quiet girl in a hoodie trying to reach for a book on a high shelf. After helping her pick up the dropped book, Hidekazu meets Iroha Nenegawa, a 3rd-year student. She muses about his name, wondering if Hidekazu could be an ally of hers or would he betray her like Mitsuhide Akechi betrayed Oda Nobunaga at Honnoji or if he’s clever like Kogoro Akechi, the fictional detective created by fiction writer Edogawa Ranpo. They hit it off and become friends.
With only seven days left for her investigation of the Seventh Wonder, Ayako happens upon her friend Anna and another girl, Komaki, making love in Anna’s room. Ayako seemingly had no intention to peep but in the process of doing so she comes across the ghost. Ayako screams in surprise and is subdued by Anna who discovers her peeping. Unable to explain herself, Komaki is convinced that Ayako is some sort of pervert and Anna dismisses the idea that a ghost appeared only because they were having sex. Dejected, Ayako returns to her room where Miyabi, the ghost, appears before her again. She finds out that Miyabi in fact is a fan of peeping on girls making love. With no way of writing a report on a ghost that is not only, not haunted by the past or a grudge, and instead simply has a unique past time, Ayako tries to find a way to convince Anna and Komaki that the ghost is real. The plan is basically to convince Anna and Komaki to get it on in order to lure the ghost out. What Ayako doesn’t realize is that seeing Anna making love to another girl is also causing her to question her own emotions and desires as well. These are the odd, fun, and precious seven days of Ayako and her friends.
Biochemist Victor (the inventor of the serum) and three girls go to the isolated private residence high in the mountains. They work, they rest and make experiments there. The serum has an impressive effect – your sex satisfaction becomes incredible. But there’s one unpleasant side effect – partial memory loss. A person forgets everything since the moment he gets the injection till the moment he wakes up next morning. But this serum testing is only a context of our main story.