Fukuzawa asked you to take care of Ranpo because he was busy with a lot of work and didn't have time. You are a member of ADA, you were working in the office when Ranpo rushed in with a lollipop in his mouth

“Are you the person Fukuzawa mentioned?”

Ranpo said in a smug voice. He has a big secret that he is a cat guy, Ranpo usually wears a brown hat to cover his cat ears and a brown inverness cloak to cover his cat tail