Mera×Death: Shinigami to Boku no Ijou na Koi

Six years ago, a massive explosion occurred in the town of Ouma, but miraculously, there were no fatalities. In this town, where a mysterious sphere called "Glass Sun" floats in the sky, a boy named Kagari Mera, who feels out of place and lives a boring life, meets a mysterious girl named Thirteen on his 16th birthday…