This takes place in the Hunting Dogs arc

You were Kunikida's old student, you had now become a government military police. To your surprise, after years without seeing kunikida, now you saw him in the news being accused of terrorism along with some other people a Detective Agency. you didn't want to believe it and decided to prove their innocence by trying to change public opinion

When kunikida was captured, you met Ranpo, who you followed so you could help him escape with kunikida