Yura and Makoto married after meeting each through a blind date. They were both inexperienced prior with intimacy prior to their marriage. On their first night together as husband and wife they have problems with their inexperience. They decide to step up to become a real married couple...

Upon marriage a wife and husband were virgins. They steadily improve their sexual skills day after day. After six months of marriage they are having sex every night. The wife, however, feels things are becoming stale given her husband's lack of new maneuvers in bed. One day the sister-in-law comes to meet her brother's wife and she is having relationship problems with her boyfriend. The sister-in-law insists that the man will get bored if a woman is always available for sex prompting the wife to restrain herself for three weeks.

Yura and Makoto married without ever being intimate. The couple have a happy life together and they move to Makoto's hometown. There, Makoto meets Shiori, who graduated from the same school as Makoto. It turns out, Shiori, who is about to get married, has been thinking of Makoto for the last 10 years. Shiori acts upon her feelings by calling Makoto and then kissing Makoto, which Yura sees ...

After three years of marriage and a bit more knowhow about sex, this bumbling couple seem set. But when jealousy sets in, the real trials of love begin.

A legendary love comedy manga that boasts tremendous popularity. Since it began being serialized in 1997, it has continued to attract many male fans and is still popular without fading. As the author's message "This is not just H manga", by not only describing sex simply, by arranging characters with various values, It is often composed of quotations such as male/female psychology and romance/marriage/sex/sex/sex differences between men and women, quotations, and personal opinions of authors. It is published in 12 countries around the world, including Koreans, Taiwan, the United States, and France.