No Doubt In Us - Xuanli ver.

When Jiang Yanli goes to the Cloud Recesses, she sees a new hope of being friends with her future husband, she's finally free from the constant surveillance of her mother! But when she falls into a cold spring, she finds herself waking up in the wrong dormitory, full of boys!
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Jin Zixuan had known he was betrothed his entire life, hating it more by each coming year. He deserves his freedom as a man! Not that he wants to be like his father, of course, but how could a sect heir possibly be happy like this! He only went to catch her, not realizing that he didn't have proper footing...

Now why they hell are Wei Wuxian and Jiang Cheng standing over him!?
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Remember that scene where JZX saves JYL from falling? Yeah, they both fall in & body swap NDIU style