After his mother died, Kodama Makoto went to live under the care of his mother's friend. One night of Valentines day, an idol Annacame to announce that she is going to be engaged to Makoto. This is the starting point of a slapstick comedic adventure game.
However, this is not your usual game where the innocent protagonist aim to capture the girl of his dreams. In fact, Makoto is hardly your average innocent hero, and Anna is, in someways, a victim of a conspiracy to get Makoto and Anna married. Of course the two young people are against this decision, but under all sorts of pressure, they have to succumb and live together. To make things even more complicated, Makoto's sister, who has been living abroad all these years came home to live with them. This in turn provoked Makoto's neighbor and at the end even his old girlfriend gets involved.
On that night of Valentines day Makoto's fate was linked with more girls than he can manage, and at the end, can he put the end to that conspiracy?
Or will he be too happy living his new life that he give up his efforts altogether? That is for you to decide on White Day.