Inventory of The Famous Scene: Starting from Emiya - Chapter 2: Oath Under Snow! Emiya "Big Hero?"?

I became a scientist for an evil organization.…But I’m too competent.

The whole world is subjected to a highly dangerous standardised exam called the Global Examination. Answering questions by putting their lives at stake, they would live if they passed the test. Every month the exam will undergo reformation while, occasionally, it is random.

Selene Valor, a pureblood vampire, entered a marriage of convenience with her husband Gabriel Valor to protect herself from relatives eyeing what was left of her family's wealth. Six months into their marriage, Gabriel is sent away to war to fight for the kingdom. As time went on, news of his victories spread across the kingdom and he was labelled a hero.Nearly six months later, Selene eagerly awaits the return of her heroic husband. Upon his arrival, Selene is faced with betrayal as he brings home a woman named Cassandra Avery, a human who he introduces as his lover. Selene is heartbroken and tries to save what was left of her marriage but soon there is news of Gabriel wanting to take Cassandra as his second wife.Selene is left with the choice of accepting Gabriel’s wishes and staying protected or seeking a divorce. After a heated argument, Selene turns to someone she never expected to be her saviour. She finds refuge with Lord Xavier Blackthorn, another pureblood who seeks her hand in marriage.Will she forgive her first love or move on to accept Lord Blackthorn’s love?

“You might be my wife, but I shall not lay a hand on you.”

“Is that so? Then can I lay my hand on you?”

“……Pardon?”

***

Around 20 years in the future, the world is destroyed due to the invasion of demons. There’s only one way to prevent the destruction.

Marry the Duke known as the Monster and give birth to his child who will grow up to be the future warrior.

“Mielle, that marriage, I’ll do it instead.”

Yelena, who saw the future,
decided to get married to the Monster Duke and give birth to his child to save the world, however…

“Are we going to keep being idle like this?”

She thought she would be able to get it over and done with (?),
but her husband’s impregnable fortress-like defenses are beyond imagination!

“I told you to strip! Why aren’t you stripping?! Is it a part of your skin?”

Can Yelena safely give birth to the warrior and save the world in the end?