年逾古稀的市野井雪（宫本信子 饰）因丈夫去世，从此变成孤家寡人。孤独之余，她开设书道教室排遣寂寞。偶然的一天，她徘徊徜徉来到一家书店，并为一本名为《只想永远注视你一人》的漫画所吸引。谁知随着阅读的深入，雪竟意外发现这个故事其实讲述的是两个男人的爱情！虽然和既往认知大相径庭，但是她又不自觉地为剧情所吸引。这个沉湎BL漫画的奇怪老人引起了书店打工的女高中生佐山丽（芦田爱菜 饰）的注意。丽内向羞赧，与同学相交甚少，BL漫画是她不愿为他人所知的小爱好。而雪的出现，让这两个有着共同爱好的女性成了忘年交……
本片根据鹤谷香央理的同名漫画改编。

From the New Yorker staff writer Hua Hsu, a gripping memoir on friendship, grief, the search for self, and the solace that can be found through art.
In the eyes of 18-year-old Hua Hsu, the problem with Ken—with his passion for Dave Matthews, Abercrombie & Fitch, and his fraternity—is that he is exactly like everyone else. Ken, whose Japanese American family has been in the United States for generations, is mainstream; for Hua, the son of Taiwanese immigrants, who makes ’zines and haunts Bay Area record shops, Ken represents all that he defines himself in opposition to. The only thing Hua and Ken have in common is that, however they engage with it, American culture doesn’t seem to have a place for either of them.
But despite his first impressions, Hua and Ken become friends, a friendship built of late-night conversations over cigarettes, long drives along the California coast, and the textbook successes and humiliations of everyday college life. And then violently, senselessly, Ken is gone, killed in a carjacking, not even three years after the day they first meet.
Determined to hold on to all that was left of one of his closest friends—his memories—Hua turned to writing. Stay True is the book he’s been working on ever since. A coming-of-age story that details both the ordinary and extraordinary, Stay True is a bracing memoir about growing up, and about moving through the world in search of meaning and belonging.