Saikou no Rikon Series

A romantic home comedy about 30-year-olds with an immature view on marriage that focuses on themes related to married couples and families in general. The protagonists of ‘Saikou no Rikon’ are two couples – Mitsuo and Yuka as well as Ryo and Akari. Mitsuo and Yuka have been married for two years, but their ways of thinking and living are completely different and they keep on quarreling with each other most of the time. Kosei is already regretting his marriage every day, yet his grandmother finally wants to see a great-grandchild. One day, he happens to meet Akari, his old girlfriend from his student days, which brings back pleasant memories. Right after he finds out Akari is already married, Yuka eventually asks him for a divorce but Mitsuo still ends up living with Yuka under the same roof due to some reason.

One year after their divorce, Hamasaki Mitsuo (Eita) and Yuka (Ono Machiko) are still living together—though Mitsuo is secretly hoping to remarry her. As the year ends, the two visit a campsite, joined by Uehara Ryo (Ayano Go), who shares that Akari (Maki Yoko) has given birth and will return to Tokyo soon.

Afterward, Mitsuo and Yuka visit her family home, where Mitsuo announces his plans to remarry her—bringing their parents to tears. But despite the happy news, one major issue still stands between them.

Meanwhile, Ryo reunites with his first love, Shiomi Kaoru (Usuda Asami), who once broke his heart. When they meet again, Kaoru gives him a ticket for the nostalgic sleeper train “Cassiopeia,” rekindling old emotions.

At the same time, Kurobe Santoku (Okada Yoshinori), a kind-hearted single father and bento shop owner, develops feelings for Yuka—complicating things even more.

What surprises await aboard the legendary Cassiopeia? A journey full of emotional twists is about to unfold.