This is the debut work for doujin circle integral. Kazuhiko was run over by a truck on his first day of school. However, when he arrived in heaven, God told him that itd be a problem if he was dead, and sent him back to Earth. He didnt understand what happened, but he went to his classroom and found that he had to repeat the year. His osananajimi Kanade became his senpai, and a Russian serial killer Elena transferred into his class.Whoops, I added strychnine instead of salt >_

This is the debut work for doujin circle integral. Kazuhiko was run over by a truck on his first day of school. However, when he arrived in heaven, God told him that itd be a problem if he was dead, and sent him back to Earth. He didnt understand what happened, but he went to his classroom and found that he had to repeat the year. His osananajimi Kanade became his senpai, and a Russian serial killer Elena transferred into his class.Whoops, I added strychnine instead of salt >_