He is her lover, he protects her and accompanies her. When her weight was in three digits, he struggled to carry her from the first floor to the sixteenth floor. When she clamored to lose weight, he touched her head distressedly and said: "Little fat man, if no one wants you anymore, I can support you for the rest of my life." When she was regarded as a public enemy by the class, he became an enemy of everyone, just for the joke of "not making you cry". When she successfully lost 30 pounds and turned from the object of the class's dislike to the goddess of the boys in the class, only he understood her bitter history. And the person in her heart has never been him. He knows that in this life, they can only be friends walking hand in hand through the dimly lit streets...