It turns out that my Yandere playmate online is my Homeroom Teacher - Chapter 13: Glow up!

She has stunning looks and talents that are even more amazing, but she hides both deeply because she understands that beauty is never a blessing. One who is beautiful can only bring trouble, especially within such a society where evil runs amok. In addition, one who is too crafty is disliked.

So to the common eye, she is an ugly woman, so ugly even ghosts would be too afraid to look at her, a weak, ignorant lady.

An imperial edict forces her to marry the well-renowned prime minister of Dong Ling. She cleverly deals with her situation as she faces hidden and openly disdainful looks, smiling coldly and looking on indifferently. She did not want any of this. Why do women make things harder for other women?

She is the ugly, cowardly, useless, frail Lady Zi Yinye. But she is actually the handsome and brilliant prime minister Ye Yin!!

- Description from Novelupdates

[A soul forsaken by the Gods and a body on the verge of death - The Darklord of the Endless Abyss has noticed your existence and is offering you a contract. Will you accept?]As he lay on unfamiliar land, his body covered in wounds and blood, Levi heard the voice of providence that he had craved for years.In a magnificent and mutated future, the advancement of technology and space exploration has opened new paths unknown to humanity. Being the curious creatures they are, and with hopes of saving the dying Earth suffering from resource depletion, humans began to explore these unknown lands.It was there that they discovered the treasures of the otherworld - artifacts and magical items that defied all scientific knowledge. But along with these treasures, humans also encountered dangerous and vicious monsters capable of tearing them apart with a flick of their fingers.However, humans were persistent. The treasures of the otherworld were too enticing to ignore. They struggled against the odds and found a way to fight these monsters by making contracts with the gods.The gods of the unknown lands bestowed extraordinary powers upon humans in exchange for the promise of extinguishing all the monsters. But not everyone was so fortunate, like Levi, who failed to pique the interest of any gods, and became one of the Forsaken.The Gods had forsaken him, so Levi decided to forsake the world - he made a contract with the Demon King himself!

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

She, a renowned assassin of the 21st century, actually crossed over to become Su Manor’s most useless good-for-nothing Fourth Miss.