《同居男友是人鱼》是一部浪漫爱情电影，讲述了美术专业的女大学生江小鳗在失恋后陷入低谷，而她的室友和同学阿那托利·水星是一位帅气的人鱼。他陪伴江小鳗度过了失恋的阴霾，两人在相处中逐渐产生了感情。然而，人鱼族的真爱之吻对于阿那托利来说却十分困难，要完成这个任务并不容易。在一系列有趣的冒险和挑战中，他们逐渐相互了解、支持和依赖，爱意渐生。

江小鳗和阿那托利的相处充满了欢笑和调皮，他们在一起时仿佛置身于童话世界。江小鳗发现了阿那托利身上独特的魅力和温暖，而阿那托利也为江小鳗的坚强和善良所倾心。他们一同度过了许多愉快的时光，慢慢地被对方所吸引，彼此间的感情不断升温。

然而，江小鳗的学长程曦的出现给他们的感情带来了新的考验。程曦对江小鳗产生了特殊的关注，让阿那托利感到了一丝危机。他开始怀疑自己是否能与人类女孩拥有未来，但他的爱和坚持使他不愿轻易放弃。

在经历了一系列的困难和挑战后，江小鳗和阿那托利终于明白，爱情并不是一场简单的游戏，而是需要勇气和坚持。他们相信，只要坚持自己的真心，相信童话中的奇迹，就能实现彼此的幸福。

"The Boyfriend Who Lives Together Is a Mermaid" is a romantic movie about Jiang Xiaoe, a female college student majoring in fine arts, After falling out of love, she fell into a trough, and her roommate and classmate Anatoly Mercury is a handsome mermaid. He accompanied Jiang Xiaoyu through the haze of broken love, and the two gradually developed feelings as they got along. However, the mermaid's true love kiss is very difficult for Anatoly, and it is not easy to complete this task. In a series of interesting adventures and challenges, they gradually understand, support and depend on each other, and love grows gradually.

The relationship between Jiang Xiaoel and Anatoly is full of laughter and mischief. It's like being in a fairy tale world when we are together. Jiang Xiaoel discovered the unique charm and warmth of Anatole, and Anatole fell in love with Jiang Xiaoel's strength and kindness. They spent many happy times together, slowly attracted to each other, and their feelings for each other continued to heat up.

However, the appearance of Cheng Xi, Jiang Xiaoel's senior, brought a new feeling to their relationship. Here comes a new test. Cheng Xi paid special attention to Jiang Xiaoyu, which made Anatoly feel a little crisis. He began to doubt whether he could have a future with a human girl, but his love and persistence made him unwilling to give up easily.

After experiencing a series of difficulties and challenges, Jiang Xiaoel and A Natoli finally understands that love is not a simple game, but requires courage and persistence. They believe that as long as they stick to their sincerity and believe in the miracles in fairy tales, they can realize each other's happiness.