在电影《我朋友的老姐3》中，主人公Min-wook深深地爱着他的室友朋友Yeongsu的姐姐Sujin。然而，Sujin即将嫁给一个符合条件的男人。他试图隐藏自己的心意，祝愿姐姐幸福。然而，几个月后当他看到Sujin离婚后，那份旧情复燃。离婚后的Sujin决定暂时住在姐姐的家里。Min-wook和Sujin同住一屋檐下，两人开始试着确认彼此的爱情…

《我朋友的老姐3》是一部关于爱情和成长的电影。Min-wook一直暗恋着Sujin，但面对她即将结婚的消息，他只能默默祝福。然而，命运却让两人在Sujin离婚后再次相遇。此时的Sujin经历了一段婚姻的挫折，心境有所改变，而Min-wook对她的情感也愈发明确。

电影通过展现Min-wook和Sujin之间的情感变化，反映了爱情中的复杂与坚定。当初的暗恋如今变成了成熟而真挚的感情，两人彼此间的了解和默契也逐渐升华。Sujin离婚后的复杂情绪和Min-wook对她的陪伴，让他们之间的羁绊更加深厚。

In the movie "My Friend's Sister 3", the protagonist Min-wook is deeply in love with Sujin, the sister of his roommate friend Yeongsu. However, Sujin is about to marry a man who meets the conditions. He tried to hide his heart and wished his sister happiness. However, when he saw Sujin's divorce a few months later, that old love rekindled. After the divorce, Sujin decided to temporarily live in her sister's house. Min-wook and Sujin lived under the same roof, and the two began to try to confirm their love for each other..

"My Friend's Old "Sister 3" is a movie about love and growth. Min-wook has always been secretly in love with Sujin, but facing the news of her upcoming marriage, he can only silently bless her. However, fate made the two meet again after Sujin's divorce. At this time, Sujin has experienced a setback in marriage, and his mood has changed, and Min-wook's feelings for her have become more and more clear.

The movie reflects the complexity and firmness in love by showing the emotional changes between Min-wook and Sujin. The original secret love has now turned into a mature and sincere relationship, and the understanding and tacit understanding between the two have gradually sublimated. Sujin's complicated emotions after the divorce and Min-wook's company for her made their bond even deeper.