Time Travel at the Beginning: the Sister Next Door Is Actually My Child Bride

[Single female protagonist + 1v1 + daily life + sweet story + full text without swords] In the 21st century, Ye Yichen traveled through time due to shock while playing games. Wake up, "Beauty, who are you?" "I'm your sister." "Where is this?" "The first hospital in Shanghai." "Am I not in Jiangcheng? Besides, where did the Dragon Kingdom come from? Did I travel through time?" "Beauty, ah no, what is my name, sister?" "Ye Xunian." "Isn't my name Ye Yichen? I really traveled through time." But why don't I have the memory of the original owner at the beginning?