Shoichi who lost mother when it is young, Father and living of two people. However recent Father remarries happily. Remarriage partner's name is Yuuko. For Shoichi it was a woman who was too young to call it a mother-in-law. Yuuko is brightness of inborn, it is gentle to Shoichi... To Shoichi who doesn't remember mother's warmth, every day of puzzled continues.

Yuuko is pained to Shoichi who doesn't forgive the mind easily, it talks with older sister and her husband. Then the existence of the camp event in which it participates by parent and child is told. The camp "It makes up for lack of communication of parent and child" purpose, it is held during summer vacation of every year. The camping event travels for one week of 7 days and 6 nights. Yuuko also must participate with Shoichi so it applies to the camp event.

And that day... While charmed by to Yuuko's hand Shoichi, it went to the local. Can Shoichi accepted Yuuko as mother? The event which it waits beyond this, how is Shoichi changed?