Meikyuu Romantica

Akari Shimotsuki is a normal high school girl. One day, At the moment she was about to confess her feelings to her long time love Mamiya, she loses consciousness and finds herself in an entirely unfamiliar world. Additionally, for some reason she is now in someone else's body and people are addressing her as "my lady"... Mysteria Romantica is a love fantasy that crosses time and space!

(Source: Media Do International)