When I Woke Up, My Rival School Beauty Became My Wife?

When he opened his eyes, the aloof school beauty who had always been against him was lying naked under him! What's going on? Eight years later? Everyone else travels forward, but I travel backwards! It's okay to travel through time, but how did the once elegant and free-spirited self turn into a soft-boiled person? And a lovely daughter? My former girlfriend became green tea! The former enemy became his wife! Is it going to be a soft meal to the end, or is it making a comeback? Should he continue his romance or turn back?