'I', along with that girl, 'me' and that girl's 'Mama'. An early afternoon in summer on a listless day, the relationship between 'I' and 'Mama' started with the scent of her breasts dewed with sweat. A passionate and erotic story by Tsuyatsuya about love triangle involving both mother and daughter! (Source: Akita Shoten, translated)

This Oneshot's about a delusional teacher that attacks students with a mutated creature, which is a combination of dissected frogs, called Dorn... In other words, it's a weird story but not necessarily in a good way.

A story about a crossdressing teacher handling a delinquent class.

Teenager Murakami Chisato was sick of her granny panties and was hoping she would get lingerie that was more modern. Then out of nowhere, on her way to school, a pair of sexy lingerie falls from the sky. Confused at where it came from but excited by what she found, Chisato decides to keep the bra and panty. Little does she know that they were actually Miracle Lingerie from space that absorbs sun light and gives the user extreme amounts of power. She now has such powers as the strength to lift cars, the agility to leap from house to house and insane running speeds. The only drawback is that she has to take off her clothes and expose the lingerie she is wearing to the world for it to give her powers. Her classmate, Umeko (aka Plum) Sainoji, also has Miracle Lingerie and is scheming to take Chisato’s pair from her. Chisato’s classmate, Kudou Daisuke is a pervert and tries hard to make her take off her clothes to reveal her underwear. How will Chisato juggle between being a normal school girl, saving the world using her new powers, thwarting Umeko’s plans AND fighting off Daisuke’s perverted motives?

Marimo has a job to do... but it's too cold and she doesn't want to leave the kotatsu.

Toshi, an ordinary high school student, spent his days being fed and taught by a beautiful neighbor named Yuu-nee-san, who lived near his house instead of his parents, who were rarely home. The older sister was kind and perfect as an adult. However, she had a hidden side in that her personality changed completely when it came to games. Games aren't just for fun. Big sister gets angry, gets naked and spares no means! Toshi gets caught up in the duality of her personality. Here begins a surprising new erotic comedy with games and a big sister

My-Otome Zwei takes place one year after the events of My-Otome. Arika is now a full-fledged Otome (though still under the tutelage of Miss Maria as she has yet received enough credits to graduate) and Nagi is incarcerated in a prison somewhere in Aries. The various nations are at peace with one another and plan to hold S.O.L.T. (Strategic Otome Limitation Talks) to discuss limiting the numbers of Otome. A mission to destroy a meteor threatening to collide with Earl sets into motion a chain of events which result in a mysterious shadowy figure attacking Garderobe and several Otome as well as a new, more powerful version of Slave appearing across the planet. To make matters worse, Queen Mashiro disappears following an argument with Arika. The series follows Arika's search for Mashiro as well as Garderobe's attempts to uncover the truth behind the shadowy figure. Source: wikipedia

A boy falls in love with a girl, who is the student council president of their school. After some investigation, he finds out that she has a repressed exhibitionism fetish.

A story about a certain manga club where the senior student helps her junior elevate his drawing skills.

Nayumi is applying finishing touches to a hand puppet, but she is stuck with one thing, creating a cute face that could attract the audience. She wishes to finish before her upperclassman finds out that she still hasn't finished despite the fact that it's the day before the actual performance. Her upperclassman, Kimura, calls for her, and Nayumi panics and drops the hand puppet as she falls off her chair, but the next thing she notices, she sees Kimura picking her up. Wait, the hand puppet looks like Nayumi, and Nayumi is missing.

A detective hunts for clues on the impossible "alibi" of the mysterious girl, a suspect for the murder of her own parents, who testifies that she has the uncontrollable and spontaneous ability to transform into literally anything. This collection of short stories is filled with mysterious and fantastic plot, introducing you to the fantasy worlds of Kawaguchi Madoka! (Source: MangaHelpers)