unsociable boy Tries to find love

The world has changed to deal with the dropping population in Japan to combat this students are now given love classes and relationships are encouraged.

The lead is an unsociable boy in highschool and due to his difficulty communicating with the opposite sex to the point of making him sweat buckets he is ranked F and has given up on love. Through a surprising encounter he gets in touch with the S rank untouchable Angel of the class and they agree to help each other out with their respective problems.

Will he be able to rise through the ranks to find love and can his natural charms even with over an Angel?