When good-for-nothing employee Daichi is attending to a backlog of work, a frightening game of tag targeting people with blood type B begins.

Sakai's Happiness is a humorous and bittersweet portrayal of an ordinary family dealing with the challenges of everyday life.

Set in the year 3000 in New Tokyo where this time round, human beings with blood type B are being targeted.

While researching a story on a school for problem children, Nakahara meets Emi, a college volunteer with a compelling tale of her own. After overcoming her initial reluctance to open up to the writer, Emi talks about her busted leg and her childhood friendship with the chronically ill Yuka.

After his parent's divorce, Kazuo Saito moves with his mother from Onomichi and must leave his girlfriend behind. At his new school, Kazuo is surprised to reunite with his childhood friend Kazumi.

某个平静的早晨，久保家的顶梁柱毫无征兆地离开人世，只留下妻子房子（松坂慶子 饰）和三个儿子相依为命。在此之后，奔丧而来的叔父（岸部一徳 饰）和他们住在一起，组成一个新的家庭。为了养活孩子，房子身兼数职，辛苦打工，偏偏孩子们还性格各异，问题多多。沉稳老成的长子政司（久野雅弘 饰）恋上了美丽的女大学生由加（加藤夏希 饰），对方却有着恋父情结；次子行雄（森田直幸 饰）是个直来直去的莽撞少年，某天他发现和父母兄弟长相不同，因此开始怀疑自己的身世；幼子宏基（大塚智哉 饰）正就读小学，心中时时刻刻希望变成女孩子。久保家的故事在大阪的天空下缓缓展开…… 本片根据森下裕美的同名漫画改编。