The government took drastic measures to combat the falling birth rate and created Kukuri Gakuen, nicknamed ‘Renai Gakuen’, as a model case to promote love between students. Yuuki’s parents did not outwardly show their love towards each other, so he was never interested in love. However, he was suddenly chosen to attend ‘Renai Gakuen’ despite his wishes.

In this school, students receive bracelets, called "rings", which they must exchange with another student they want to date.

Their exchange is like a confession and the evidence of shared love.