Oshikake Juusha to Watashi no Kekkon

I have a perfect plan for my life, and the man who appears in front of me is a devoted man! My hobby is reading master-servant stories from other worlds. Whenever she had a bad day at work or wanted to escape reality, she got through it by spreading the wings of her imagination. But she suddenly finds herself in an unexpected relationship with a man named Tamotsu!

(Source: Shuueisha, translated)