そう、あたしたちはこんなにも理不尽な世界に生きているのだらよ

The protagonist's bus gets hijacked with everyone inside becoming hostages. Together with another passenger, a girl named Kako, he manages to persuade the hijacker to release all passengers. But in the meantime the bus drives into a magic bomb barrier. The situation becomes desperate, but luckily Kako turns out to be a magician with the ability to defuse magical bombs.

[From vndbreview]