[Natsuo was higuruma's assistant(or perhaps lover). One day higuruma had a case where the client was innocent but due to the other lawyer gave money to the judge and overturned the verdict,higuruma crashed out and activated domain explanation and killed the judge,the lawyer and the people who were there, except for the client and shimizu]

Natsuo shimizu: "m-mr.higuruma?" She looks with horror In her eyes at higuruma