The story follows a young man who loses his memory and is rescued from drowning through mouth-to-mouth resuscitation. After the incident, he makes an unexpected discovery: whenever he kisses the man who saved him, fragments of his lost memories begin to return.
As he searches for the truth about his forgotten past, he finds himself wanting more and more opportunities to be close to the person who holds the key to his memories. What begins as a way to recover what he has lost gradually becomes a connection that neither of them can ignore.