My Phone Connects the Past and Present, and I Fell for the God of War Prince

Her phone fell into a ditch and vanished. A mysterious old man gave Mu Wanyan a limited-edition phone of the same model. She added someone called the Prince of Yan as a friend. After repeatedly failing to get her phone back, she unexpectedly learned that they lived in different time periods. She had to keep chatting with him, however reluctantly, to complete missions and unlock more features. It definitely wasn't because she was falling for him.

Yan Ningzhou, the Prince of Yan in the Great Yan dynasty, found a little black box among the spoils of war. At first, he thought it held the enemy nation's secrets. He arranged to meet the "spy" several times, only to be tricked each time. By chance, he learned that they lived in different worlds. The little black box could not only transmit voices across thousands of miles, but also had all sorts of miraculous functions. The woman inside the little black box lived in a world that amazed him. Perhaps she was a celestial maiden from the heavens.

From then on, the two began a romance spanning the past and present, with a phone as their link.