5PB.

This is an original story expanded from the STEINS;GATE game, and focusing on the heroine Amane Suzuha. In 2036, a monopoly on time machines has created world peace, but at the cost of human liberty.Suzuha has followed in her late father's footsteps

The master of the school has an overwhelming power over the events that happen around the trapped. And that power is even greater on a certain day: her birthday.