
THIS IS SPOILER DON'T READ IF YOU DON'T WANT TO KNOW
The real wanwan is already dead. Si yehan wipe her memory and put her in that family. They met in that secret island for martial arts people and fall in love without knowing eachother real identity but yehan family background was so pitiful (he never knows love) that's why when he fell in love it becomes obsession and do anything to protect her. They both actually have an incredible secret identity, tho wanwan already forgot about her's. But the main reason si yehan is sick in the first place is because he protected wanwan. Their origin stories is actually pretty sweet but everything else about people in that island is actually sad.

I'm not joking I already read all 2490+ chapters of the novel. Here's a link if you want to read it too
https://boxnovel.com/novel/perfect-secret-love-the-bad-new-wife-is-a-little-sweet/
Can anyone give me any detailed spoilers?? Especially about Wanwan’s past and how Si Yehan became obsessed with her?? Plz and thank uuuu