Lea is a young girl on the brink of death. She begins her final challenge, a thesis that seeks proof in the belief that happiness can be multiplied, as can the feelings of sadness, loneliness, and misery. Unfolding the research, she discovers the "Werther Effect", a phenomenon that creates a negative domino effect. She turns to her work on a project which will achieve the opposite effect, something which would be named the "happiness effect". Utilizing an eclectic, individualistic approach to experimentation and the power of positive thinking, connections and equations lead her on a path to uncover ultimate happiness.
张静初,芦芳生,余皑磊,高冬平,董畅,张宁浩,李晓川,富冠铭
河合优实,田中丽奈,根本真阳,森山未来,杉田雷麟,岩男海史,吹越满,萩原圣人,涩川清彦,酒井若菜
拉斐尔·佩尔索纳,多莉亚·蒂利耶,让娜·巴利巴尔,艾曼纽·德芙,文森特·佩雷斯,索菲·吉耶曼,亚历山大·萨洛,Florence Ben Sadoun,Mélodie Adda,卡琪娅·申库,塞尔日·里亚布金,Constance Verluca,Joniece Jamison,Jelle De Beule,让·克雷蒂安·赛蓓汀·勃朗峰,Bruno Fleury,Max Harter,Raphaël Cohen,Roméo Spadone,安娜·阿尔瓦罗
彭昱畅,杨恩又,魏大勋,李雪琴,吴谨言,吕星辰,邹元清,任小丽,张靓颖,邓超
莱奥·卡拉克斯,德尼·拉旺,娜斯提亚·戈卢别娃·卡拉克斯,洛雷塔·茱德凯特,安娜-伊莎贝尔·塞弗肯,皮特·安奈夫斯基,比安卡·迈达鲁诺,让-弗朗索瓦·巴尔梅,朱丽叶·比诺什,吉约姆·德帕迪约,亚当·德赖弗,叶卡捷琳娜·戈卢别娃,卡特琳娜·尤斯皮娜,米歇尔·皮科利,奥克萨娜·莎秋
满岛光,冈田将生,阿部隆史,藤冈靛,火野正平,宇野祥平,安藤玉惠,根本真阳,磯村アメリ,丸山智己,大仓孝二,酒向芳,中村伦也,仁村纱和,石原里美,井浦新,洼田正孝,市川实日子,龙星凉,饭尾和树,吉田乌龙太,药师丸博子,松重丰,绫野刚,星野源,桥本润,前田旺志郎,金井勇太,永岡卓也,麻生久美子,水泽绅吾,岩谷健司