The Yorozuya gang returns to protect the country's shogun when the Shinsengumi police force finds itself in a crisis.

At a high school entrance ceremony, high school student Kotoko Aihara (Honoka Miki), who isn't that smart, notices pretty boy Naoki Irie (Yuki Furukawa). She falls in love with him immediately. Kotoko initially doesn't express her feelings to him, but finally has a chance to tell him how she feels. Unfortunately, Naoki turns Kotoko down, saying "I don't like dumb women." One day, Kotoko Aihara's house is severely damaged by an earthquake. Until the house is rebuilt, Kotoko Aihara and her father decide to live with her father's friend. When Kotoko Aihara moves to her new temporary house, she is surprised to learn that Naoki Irie lives there as well.

In an era where aliens have invaded and taken over feudal Tokyo, a young samurai finds work however he can.

光雄（风间俊介 饰）一心想要成为一名拳击手，为此付出了自己全部的精力和时间，希冀有朝一日能够获得世界冠军的荣耀。某日，光雄的哥哥（鹤野刚士 饰）将两只小猫托付给了光雄照顾，它们一只名叫小黑，另一只叫小叽。
一心一意精进拳术的光雄从来就没有过照顾小动物的经验，所以刚开始的时候，他完全不能够适应生活里多了这样两个“小捣蛋鬼”。然而，随着时间的推移，再加上“猫咪学者”小梅（松冈茉优 饰）的帮助，光雄和小猫之间的关系越来越亲密起来。在一场比赛中，光雄意外受伤，这严重的伤势令他无法再继续他的拳击梦想，霎时间，光雄的人生失去了全部的希望和意义。