Keitai Shoujo

Aida Hiro is in his second year of high school. All of his previous encounters with love went without reciprocation., but it's not unheard of for a 17 year-old-boy attending an all boys' school not to have much love experience. Still, he cannot be happy, being both unable to whole-heartedly pursue the opposite sex and fulfill his romantic curiosity. However, he is able to experience true romantic love when he encounters the Ketai Girl, "Rin".

Selected season 1, episode 1.