Lonely Couple, My Girlfriend and I Are Both Time Travellers.

Jiang Xun has finished playing ball. Then I wandered in time and space Just like that, I went to another world. Dad, mom and sister are all here But Su Ruanruan is not her biological sister But then, they are even closer than their own sisters. First a friend, then a little baby Jiang Xun didn't expect that besides himself, Su Ruanruan was also a time traveler. They are the only two in the whole world who do not belong to this world. They understand each other, accompany each other, eventually become lovers, and spend the rest of their lives together They are lonely couples in this other world