Mangas I read 3

Jaehyun may be the composed upperclassman on campus, but he secretly plays the hottest elven diva online with a love of pricey costumes. He meets Eunsung, a handsome first-year with deep pockets guarding his own secrets, at a school event. They connect instantly, but what begins as a sweet challenge becomes a risky game of affection on- and offline!Official English Translation on TappyToon

I died of a young age in my previous life, but unknowingly I went back in time to the past where dynasties still existed. However, this was not even a blessing. The me from that life died, killed by her own husband, the emperor. And now, I am reborn into a little girl, who is the sister of the emperor?!