Hamefura - Episode 3 - Modern World Versions of Sophia and Katarina

Katarina figured Sophia would have been her otaku friend in her past life because of their shared love or romance novels.

Katarina grew up and celebrated her 15th birthday. Through the years, she became good friends with all the characters in the otome game where the villainess meets her doom. She hasn't even realized that she assembled a harem of girls and guys fully devoted to her.