[Apocalyptic setting + slight yandere tendencies + 1v1 + invincible female lead + both leads are virgins]

When the apocalypse arrived and the world turned into a zombie hell, I, a small-time streamer, hid at home, trembling with fear.

Running out of food, I had to risk sneaking into the neighboring house to survive, only to run into a zombie neighbor with long black hair!

Even more outrageous, after drinking my blood, she regained consciousness and became the "Zombie Queen" who controlled millions of zombies!

My blood was her only food and the source of her evolution!

She is powerful and cold, with only me in her eyes. Her morbid possessiveness both terrifies and comforts me.

What?

This zombie queen, who was only interested in me, was actually my number one fan before the apocalypse!

Faced with this extreme protection and confinement, should I rely on her for survival, or try to escape?

When I held the zombie queen's hand, crushed all threats, and annihilated all who resisted, I realized what true security and despair were!

Qiubai has traveled to a world where inner and outer worlds merge. Growing up, he's surrounded by characters he's "familiar" with. There's Akizuki Airi, Akizuki Marina, Shiina Chizuru, Mashiro Chisato, Hoshizuki Kaede, Hoshizuki Suzu, Nanao Akane... and his two younger sisters, Mikan Yuuki and Kasugano Sora, who live with him. Mikan is young, but capable, mature, and energetic, taking care of the housework daily, making her a worry-free existence. Sora is slightly older, but aloof and tsundere, with a slightly frail constitution. She stays at home every day, a worrying prospect. When Qiubai turns 18, the system officially activates! Kuze Akibai: What? Just coming of age, I have to become a male succubus in the inner and outer worlds? And I even have the ability to stop time!

Taimanin? Female knight? Female elf? Female succubus? And many big-breasted sisters?

The system always gives him some not-so-serious things.

Wait...

Not only big sisters, I also want lolita!

Then with these, let's build a crystal palace in the anime world!

The so-called Garden of Eden is just like this, right?