《减重50公斤的灰姑娘》是一部感人至深的电影，讲述了微胖女生佐伯阳芽（大原优乃饰）的故事。在大学的就职活动中，她在富士崎公司的说明会上遇到了公司继承人富士崎宰（犬饲贵丈饰），立刻被他深深吸引。为了能够再次见到宰，阳芽决定减掉50公斤的体重，并成功进入富士崎公司工作。

在减重的过程中，阳芽经历了无数的辛苦和挑战。她坚持锻炼，控制饮食，战胜了自己的懒惰和诱惑，一步步接近自己的目标。她的努力和坚持得到了回报，最终成功减掉了50公斤的体重。

然而，当她以新的身材重新出现在宰的面前时，才得知宰早在她减肥前就已经对她产生了感情。这个意外的发现让她陷入了矛盾和困惑中。她开始重新思考自己的价值和内在美，是否只是外表的改变能够赢得真正的幸福。

在与宰的相处中，阳芽逐渐认识到，真正的爱和幸福不应该仅仅基于外表。她学会了珍惜自己的成长和努力，坚信内心的美才是最重要的。最终，她找到了真正的幸福，与宰一起走进了美好的未来。

"Cinderella Who Lost 50kg" is a touching movie about the slightly fat girl Saeki The story of Yang Ya (Yuno Ohara). At the university's job hunting event, she met the company's heir, Fujizaki Zai (played by Inukai Takajo) at the Fujizaki company's briefing session, and was immediately attracted to him. In order to be able to see Jae again, Yang Ya decided to lose 50 kilograms and successfully entered the Fujizaki company.

In the process of losing weight, Yang Ya experienced countless hardships and challenges . She insisted on exercising, controlled her diet, overcame her laziness and temptation, and approached her goal step by step. Her hard work and persistence paid off, and she managed to lose 50kg in the end.

However, when she reappeared in front of Zai with a new figure, Only to learn that Jae had developed feelings for her long before she lost weight. This unexpected discovery plunged her into contradictions and confusion. She began to rethink her worth and inner beauty, and whether only a change in appearance could win true happiness.

During getting along with Zai, Yang Ya gradually realized that true love And happiness should not be based solely on appearance. She has learned to cherish her own growth and hard work, and firmly believes that inner beauty is the most important thing. In the end, she found true happiness and walked into a bright future with Jae.