Enjo Kouhai

In recent time the birth rate of certain races was drastically low, and due to this the government decided to intervene. They devised a new system where a computer would assign people to each other with the only goal being to conceive and have children. Unfortunately for a certain teacher, he was assigned a student of his… and not just any student either, this student is a blonde elven princess named Iris.

Iris has been issued a bodyguard to maintain her safety while she attends her school. It just so happens that this bodyguard is also another blonde bombshell elf that has eyes for the luckiest teacher ever. After having sex while leaning over the bed of Iris, she awakens to fill them in that she heard every single bit… And so a threesome of unparalleled quality begins…

After the massive success with Iris and Aegis, a new member of royalty is assigned to the school. The Empress of the dragons is a problem child who looks down upon others races. After getting alone with our protagonist she comments on his sexual prowess and decides to have a piece of him herself.

After being exhausted by all 3 of the students wanting his sexual energy daily, our protagonist feels at though he is at his limit. Soon after he gets a call to meet up with the three of them and is told that he has to choose just one...but can he really choose JUST one?

The Ark Academy, chosen as a model case for inter-species school integration, welcomed a new transfer student, Elliott Leukosia, a popular member of a mermaid idol group. Elliott, with her delicate appearance and shy demeanor, quickly became adored by her classmates. However, she had a problem. Due to the characteristics of her mermaid species, her body would soon masculinize. "I transferred here to get your help, coach..." With her developing body, budding breasts, and slender waist, Elliott, with her innocent eyes, pleaded for 'Assistance.' The homeroom teacher, torn between desire and ethics, couldn't refuse... The mermaid's 'song' permeated his consciousness. A mermaid idol surpassing the popularity of AKB48 and TWICE is born! With her clear singing voice, your baton will also reach a forte!

The Ark Academy's transfer student, Origamine Ouka, was the homeroom teacher's childhood friend and the princess priestess of the oni clan. Though she used to be like a little sister to him, upon reuniting after several years, she witnessed him performing 'Assistance' with a student and exploded in anger. Ouka sealed the teacher's manhood with an oni spell. "You are tainted, brother." Unable to perform 'Assistance,' the teacher tried to persuade her, but Ouka was adamant. As a last resort, he decided to gently unravel her heart, which had been restrained as a princess and a priestess, with his kindness as a childhood friend and a teacher. Sweet moans unimaginable from her dignified demeanor, and her ample breasts released from her solemn kimono. What was supposed to be a sex-filled time in the absence of the oni turned into tears in the eyes of the oni! With more intense service scenes than ever, it's a golden club for the oni!