This book is also known as My Wife Has Lost Her Memory Again and Again and Again and Again or Shock! My Wife Isn't Normal at All. Well, Neither Am I, Actually
Early story: [A reckless, fake-cold top who is still developing his own emotional System] X [A genuinely tsundere beauty bottom who goes to great lengths to hide his identity]
Later story: [A silly top] X [A silly bottom]
Mu Chen realizes that the person who has followed him for nearly ten years has become hot-tempered and liable to blow up at the slightest provocation. Whatever happened to his former gentle, refined, peaceful demeanor? Has he grown tired of me? But he's the one who's so forward.
“Don't go. How can you leave...?”
Han Yihan slaps him across the face. “So you were trying to suffocate me under the covers?”
Han Yihan has spent his whole life either losing his memory or on the way to losing it.
After a premeditated car crash, Mu Chen loses his memory too...
In short, this is the day-to-day struggle between two people with amnesia.
After working so hard to return to the laboratory and recover his memories, Han Yihan breaks down when he discovers that all his lost memories are with Mu Chen.