The day of his mother's funeral was in the early summer when he turned 17. That was the same day he met Yashiro Kyouko. During the days he felt restless, she was the one who supported him. As long as she was there, then he could continue to live. In the peak of summer, the boy was taken away to "paradise."
Warning, the series titled "Zetsubou no Rakuen" may contain violence, blood or sexual content that is not appropriate for minors.