Kodomo no Kamisama

Makoto Kaizuka is a young boy who enjoys his recess with a few friends at a local shrine. He often sees a girl named Yukari at this spot, who soon becomes one of their regular playmates. Yet, to Makoto's surprise, his friends begin to gradually forget about her existence. Understandably bewildered, he discovers that Yukari is actually a god only visible to children—bound to this particular shrine for eternity.

Now in middle school, Makoto is still adamantly refusing to grow up, just so he can remember Yukari for life. In addition to that, he skips classes to take photographs at random locations, showing her each time he visits the shrine. However, the harder Makoto tries, the further his childhood slips through his fingers as he ascends through adolescence.