The You Who Descended Into The Universe is a Manga/Manhwa/Manhua in (English/Raw) language, ROMANCE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

The lonely soldier, Bo Meishu, is a member of the squadron who protects the sea god. One day, an encounter with Xiuli, who fell from the sky, happens. Xiuli, who suffers from memory loss, had the same exact face as Meishu's secret love, but it isn't him. While more disasters occur, Xiuli starts to remember things and not only does he make Meishu feel emotions she has never felt before, but he also brings her a cruel future...