Stringendo: Angel-tachi no Private Lesson (2006)

Sousuke Aikawa is a part-time worker who lives in a rundown apartment building where his only consolation is that the landlord is a beautiful woman and the girl who lives above him is cute. One day though, the ceiling above him creaks and... Bang! In from the second floor, directly above him, the cute girl comes crashing down on him…!? In an erotic encounter that can only be classified as a miracle, hearts and bodies are connected by chance. Then for some reason, he starts to live with both of these beautiful women!? Under this one roof, just what exactly will become of this crowded love triangle...!?

Ao Horie's father, a popular erotic fiction author, chose Ao's name because A stands for “apple” and O stands for “orgy”! Desperate to escape her father's legacy and get into a prestigious university, Ao devotes herself to studying instead of pursuing romance. She has no time for boys, but there's just one problem: Kijima, her handsome and popular classmate, just confessed his love to her! And to make matters worse, she can't stop thinking dirty thoughts about him! Looks like escaping her father's influence will be harder than she thought...

Shiina Aki is constantly being treated like a girl due to his feminine looks so he decides to move to Tokyo to attend middle school in an attempt to change himself. However what awaits him in his new home, Sunohara-sou, is the kind-hearted caretaker, Sunohara Ayaka. Along with the three female members of Aki's new middle school's student council, Yukimoto Yuzu, Yamanashi Sumire & Kazami Yuri. And so begins Aki's new life in Tokyo living with 4 girls.

This is the story of a boy, who became the lone Adam among four billion Eves. In a world where a pandemic has rendered all men impotent, high school student Itsuki is the exception who escaped it. In order to protect this secret, he transfers to a very special high school, which turns out to be composed of 90% girls! There, he encounters an upbeat and friendly senior, a sexually frustrated female teacher, a tomboyish school 'prince,' and an heiress from a wealthy family. For Itsuki, who has his pick of any woman in the world, the question remains: which one will he choose?

The story follows Rena Yukuhasahi, a reserved office lady and Ryouhei Hachiya, a businessman and fellow colleague. Yukuhasahi appears to be the most reserved girl in the company, but becomes a super beautiful woman when she dresses up. Flustered in the presence of her transformed self, Hachiya insists on taking her out, only to find themselves in front of a love hotel.

Male student Souta Tsukishima begins working at his family's public bathhouse as a back washer. While concealing her true identity, Souta's classmate Aoi Yuzuki visits the bathhouse. A relationship between the two begins to develop when Souta washes Aoi's back.

When Mafuyu Oribe and her adopted sister Tomo rescue a strange wounded man, they have no idea what they’re getting involved with or what the consequences will be. Alexander Nikolaevith Hell is an Iron Qwaser, one of many opposing factions of super-warriors.

Hida Kizuna possesses the HHG (Heart Hybrid Gear) ability, but it is not strong enough to make him particularly important. His older sister calls him to transfer to a strategic defense school, where many of the students (many of which are large-breasted girls) use their HHG abilities to fight invaders from another world while wearing extremely skimpy pilot outfits. Kizuna's fighting ability doesn't measure up, but his sister has another plan—apparently having erotic experiences with Kizuna will allow the girls to replenish their energy or power-up. It looks like his new school life is going to be full of embarrassment.

The story takes place in Japan in the early 21st century, in an alternate reality where the Tokugawa Shogunate has remained in power. In this reality, student councils are tasked with oppressing schools. Yagyuu Muneakira is a high school student who rebels against his student council with the help of girls who've had the names of famous samurai heroes passed on to them.

Asahi Kashiwagi lives the typical life of an average high school student — until the day a TV fortune teller’s predictions come true one after another, culminating in a series of risqué encounters! Destiny seemingly draws five beautiful girls into Asahi’s path, and soon he finds himself fielding not one, not two, but five love confessions. Asahi will need to follow his heart to find the perfect love for him, or else his love fortunes may end in one epic flail and flop.