"I didn't laugh." Clara said.
"I wasn't expecting you to." Leo replied with a smile.
"I'm glad you realize your joke isn't funny." Clara said, before glaring at him, "it will only work if I'm in love with you and you are also in love with me, which would never be possible." she said as a matter of fact.
"Why wouldn't it be possible?" Leo asked.
Clara was shocked by the question, "wait! you want me to fall for you?" she asked.
Leo realize what he asked and quickly change it, "what I meant was why is it trying to seduce me then." he said.
Clara isn't craving such request from him at the beginning, so she didn't mind how his excuse didn't add up, "trying to make you fall for me." she said.
"It has succeeded already," Leo said in his heart. He didn't understand himself anymore and only this reason makes sense. He has started falling for her.