Leonard returns from his North Sea expedition to find that his relationship with Penny involves more beta-testing than he’s ever done in a lab. Howard’s attachment issues with the women in his life in particular and Raj’s social breakthrough with women in general provide more laughs. Bernadette and Amy stand staunchly by the men in their life, even when they’re sitting in marathon role-playing games. Sheldon sees his mom in a totally different way, parties with James Earl Jones, establishes a (sort of) bond with his idol Professor Proton and makes a scientific breakthrough that breaks down before you can say Science Friday.

2012年，日本30~45岁女性未婚率再创新高，而在这个群体中，有一部分人则抱定了不结婚的信念生活。年届35岁的旅行社合同工田中千春（菅野美穗 饰）自5年前平平淡淡结束一段恋情以来，似乎始终没找到结婚的感觉和动力；44岁的庭园设计师桐岛春子（天海祐希 饰）曾与上司有过不伦之恋，但她始终坚定作一个事业至上的不婚主义者；32岁的花店职员工藤纯平（玉木宏 饰）一直认为结婚后会失去更多空闲时间，温柔亲和的他乐得单身，悠闲自在。在命运的驱使下这三个人相识相知，可是婚活战线、工作调动、旧日梦想让他们重新审视各自的人生选择。
当今时代下青年男女群像，无论几多考验与磨难，他们的笑容一如阳光般绽放……