Writing a story about saving Rei Furuya. Updates whenever inspiration strikes.
During his time at police academy, Rei Furuya became bound to a rescue System. Through the System, he learned that many people would die in the future. As a prospective police officer, of course he chose to bind himself to the System and protect everyone.
An atypical bad ending. The protagonist can be said to have died, or you could consider him eternally alive.