How do ultrasonic doctors make money online?

How do ultrasonic doctors make money online?

The researchers screamed all at once.

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「T-this way…」

One of the researchers began to guide us to the back of the laboratory.

In the back of the laboratory was a prison with iron bars, and in it there was the figure of Ria with both hands and feet restrained.

「Ri, Ria!」

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「A-Allen! Even Rose, and Leia!」

Apparently, there was no serious injury to her body.

As I sigh a breath of relief,

「Where’s the key?」

「He-here…!」

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Sensei received the key from the researcher, unlocked the prison and continued to remove the chains on Ria’s hands and feet.

「Allen!」

「Oops!?」

Free from her restraints, Ria jumped into my chest.

「I was scared…I was really scared…」