Nana, a model student who serves as student council vice-president, and run-of-the-mill virginal high schooler Kaoru are childhood friends. They embark on regular S&M play dates in secret as a stress release for Nana. For spring break, Nana goes on a school trip to a power spot in Nagano planned by the student council. Kaoru joins her, and a change occurs in their feelings.

八日堂是个普通的上班族，他喜欢上了公司的女同事栖祐，但栖祐却有一个远距离恋爱中的男朋友。因缘际会之下，两人发现了彼此互有 好感的事实，并进而发展出名不符实的友谊关系。想拉近彼此关系却又踌躇不前的八日堂，深受八日堂吸引却又无法背叛男友的栖祐，两人人的心意越是真挚，就越 是沉溺於虚伪的谎言之中，原本以为随时都能终止的恋情，却早已在不知不觉间深陷其中，无法自拔。