Honoo no Haramase Oppai ★ Ero Appli Gakuen

The protagonist, who loves boobs and bunny girls, is the head of the App Development Club. It has been secretly and casually developing a bishoujo game—an adult game—titled "Welcome to Impregnation Isekai Oppai Bunny Academy! (Tentative Title)" under the guise of a legitimate club activity. (Officially, the club pretends to be a wholesome extracurricular group, but in reality, it is nothing more than a "Bishoujo Game Development Club".) However, on Usaki Academy's parents' day event, while debugging the game, the protagonist is suddenly transported into the alternate world of the very erotic game he had been developing!

The world he was transported to was Yggdrasil, the world setting of the bishoujo game the club was developing. Every student, teacher, and even the school director had spectacularly huge breasts—and on top of that, they were all bunny girls! It was truly a bunny girl academy so stimulating that it made his lower half feel like hopping with excitement!

It was later revealed that his transportation to this world was actually a summoning performed by the academy. The protagonist was hailed as the Legendary Great Teacher, tasked with saving the school, which was on the verge of shutting down due to a decline in its low bunny deviation score. As the academy's director performed a skill search on him, at that moment—his 'Ultra-Lewd Education Skill' activated!

The director's erotic body was soon "educated” through sex! Success! In addition, it turns out that the semen ejaculated inside the director's body had also dramatically increased her bunny deviation and skill level! This will save the school from a low bunny deviation! As you look at the bunny students with huge breasts and their mothers, your lewd ambition grows even more in your lower body. With this dirty education skill power, can you conquer and sexually subjugate the school...... or even the other world entirely?

The protagonist's lower body is inflamed with ambition for perverse sexual uniforms and mother-daughter sexual relations in this otherworldly academy. "I'm going to give the students and mothers of this 'Oppai Bunny Academy' a perverted education!" Your ambition for oppai bunny girls begins now!

https://vndb.org/v21529
We already have oppay academy but but there is a HD remaster plus out with all DLC's.

Discover your perfect MUSE amidst music beats! This is a simple SUPER CASUAL rhythm game, full of colors and beauties! Collect stars and obtain HEARTS from women! Seek your path to the perfect date! Just remember - Girls will be listening. So don't step on her feet...

It was a sudden confession. Kento’s classmate Aoi was like an unattainable flower whom he could only watch from afar. Now, Aoi stood in front of him in the classroom at night. “I love you! Please go out with me!” He couldn’t imagine that it would finally be his turn to get a girlfriend. He was convinced that he wasn’t that popular and it must be a punishment game, he ran away in confusion.

The next morning, the principal made an abrupt revelation: the school was actually a boys’ school! The cute kouhai in his club. The pretty, but delinquent-like senpai. Yes, that ‘girl’ who confessed to him last night too. They’re all guys!

A breast demon who uses her enormous breasts to squeeze out men’s semen. Engage in a fierce battle with Enano, the breast demon.