《濑户内海》是一部2016年上映的日本喜剧电影，影片讲述了两个高中生濑户和内海放学后在河边聊天，分享他们的青春故事。

内向眼镜男内海和原足球队员濑户，本是没有交集的关西高中生。有一天，濑户被足球队开除了，情绪低落来到河边散步，恰巧遇到正在那里等待补习班的内海，他们由此开始了无话不谈的交流。每天放学后，两人都会在河边相遇，聊聊天。在内海去上补习班的时候，濑户在河边等待他的归来，他们的交谈充满了感性和幽默。

一天，美丽的女孩樫村一期出现在他们的生活中。内海心动了，但他太害羞了，无法向她表白。濑户帮助他，想出了各种奇怪的主意，却都以失败告终。最终，内海在濑户的帮助下和樫村一期走到了一起。

濑户内海以幽默和感性的方式，展现了两个普通高中生之间深厚的友谊和纯真的爱情故事。影片中的濑户和内海，用他们的成长经历让观众领略到了人生的瞬间美好。

"Seto Inland Sea" is a Japanese comedy film released in 2016. The film tells the story of two high school students, Seto and Utsumi, who live in a river after school. Chatting and sharing their youth stories

Utsumi, an introverted man with glasses, and Seto, a former football player, were originally high school students in Kansai who had no intersection. One day, Seto was expelled from the football team and went for a walk by the river in a depressed mood. He happened to meet Utsumi who was waiting for a cram school there, and they began to talk about everything. Every day after school, the two would meet by the river and chat. When Utsumi went to cram school, Seto waited for his return by the river, and their conversation was full of emotion and humor.

One day, the beautiful girl Kashimura Phase I appeared in their lives. Nei Hai was moved, but he was too shy to confess his love to her. Seto helped him and came up with all kinds of strange ideas, but all ended in failure. In the end, with the help of Seto, Utsumi and the first phase of Kashimura came together.

Seto Inland Sea presents a deep friendship and innocent love story between two ordinary high school students in a humorous and emotional way . Seto and Utsumi in the film use their growth experience to let the audience appreciate the momentary beauty of life.