MTL - I Made Scientific Magic - Chapter 12 Lynn: I can answer this question! (Seek to follow up)

After many years of unrequited love, she used her power and favors to coerce him into marrying her. Yet, she knew there was a constant “lunar light” in his heart. In the presence of this lunar light, he would never cast a glance upon her. Eventually, she regretted it, she no longer wanted this marriage. But who could tell her why the man had started to relentlessly pursue her now?

"Your bed is cold," spoke a voice in the room that had her eyes go wide in fear. Nervously, she turned around, gulping softly to see a shadow on her bed as if someone laid down there. The man who had been lying down sat up emerging out from the shadows where he had been waiting for her.

Every human on Earth was transformed into a summoned monster and was summoned to another world.