Ou no Ω ~Reikoku α wa Tatta Hitori no Unmei o Chouai Suru~

I can't let you go outside when you incite the desire to dominate... "The way he's caressing my entire body from head to toe... is so pleasant, so hot that I'm going to die..." Riko, an office lady, suddenly ends up in another world one day. The one who appears before her is a picture-perfect, dreamy, masculine prince. For some reason, just being near him makes Riko's body ache and heat up, triggering a powerful heat that she has never experienced before. Although she knows it's indecent, she can't help expressing her longing for him...!! To top it all off, she learns that in order to suppress her heat, she needs to accept an alpha's semen deep inside her. What is the "King's Omega"? The answer lies within the pages of this authentic, mature parallel world story, with instinct and destiny intertwining. Original Manga