Cherry Tree High Comedy Club

I'm Kouta Koikawa, and I'm having a problem with my studies. It's not that my classmates' ruckus bothers me, I sit at the front of the room to avoid their antics. The real problem is my social studies professor, Chieri Hase. From the day she started teaching here I haven't been able to keep my eyes off her! She's a rookie teacher, but I'm captivated by every movement of her beautiful body. I can't work up the nerve to confess my feelings - I'm her student, after all, and I'm sure she wouldn't find this sort of forbidden love to be proper... until one day when fate brings us together in an encounter that changes our lives forever.

Student detective Chijinda You works hard to solve a series of disappearances at Yabaize Academy, but behind the incidents lies the terrifying ambitions of the Advanced Science Research Club. After being caught in a trap set by the club’s vice-president and shrunk, Chijinda is attacked by rats in the sewers, nearly crushed by a female student who mistakes him for an insect, and eaten by Erika, a club member who tries to destroy the evidence. With the help of Ookiku Narue, who has followed Chijinda to the school, Chijinda enters the Advanced Science Research Club’s underground laboratory to return to his original size.

Club activities.
Looking back, it's a moment of youth that passes in the blink of an eye, but group activities take up a large part of student life.
"Would you like to have tea?" This was the reverse pick-up I'd dreamed of! But it turned out to be an invitation to join the Tea Ceremony Club.
It was perfect for me, as I hadn't decided which club to join. The Tea Ceremony Club had cute seniors and a beautiful teacher! I thought this would be a fulfilling youth, but I was wrong.
Yes, this was the "Sadistic Club" in disguise as the "Tea Ceremony Club"!
A sexy-looking woman attacks me like a zombie, strips me naked, ties me up, and footjobs my dick in front of everyone in the club, making me ejaculate in an instant!
The sad sex of a virgin. "So this is a masochist..." I couldn't help but burst into tears at her arbitrary judgment of me as a masochist. The seniors were ecstatic... What? That look of accomplishment on their faces...
"S is service, masochist is hospitality" - what's that? Using masochist men as bait to attract loads of dominant women! What's that?
All of the seniors are very interested in S&M! The days of training to become the ideal masochist man begin now.

Janieve High is your average all-girl high school. The only thing that makes it stand out is that it is the first school in the country to try out the bridge year initiative. Claudia Flaurance, great-granddaughter of the school’s founder, takes this opportunity to be part of the first wave of students for this optional seventh year of high school. Now that she finds herself alone and without friends in a class full of girls who have known each other for years, her new life at her ancestral school can begin.

Two other girls, Gabriella and Michelle, won’t let Claudia be friendless for long though. Together they try to find a school club to join to solidify their friendship.

But wouldn’t starting your very own club be the better option? And with that Claudia is not only the new girl, but also the president of the brand new book club.

This new book club has something to hide though. Girl-girl romance books are the only books on the menu! Now renamed to the yuri club, this club might just be what Claudia needs to get to the bottom of Gabriella’s and Michelle’s past. And if they can secretly help other girls at the school confess their love to each other, that’s even better! That is what the yuri club is all about.

Can Claudia find her place at Janieve High? Can the school help her understand the mysterious mood sensing power she’s been struggling with since childhood? And most important… Can love conquer all? Or will Janieve High’s anti-relationship rule be the end of the yuri club?

The organization where spiritual ability holders gather, “Underworld Entertainment Club”.
The protagonist is ordered to “investigate” a room that has become a den of lustful ghosts, overflowing with sexual desire.