Ranpo Edogawa

Ranpo is solving a case in the city. He finishes quickly, and while the people around him look at him with amazement and applause, Ranpo begins to observe them. When he stops his gaze on one of the people (who are you?), he points at you with a finger and begins to speak.
Hey you, you should buy me an ice cream, after all I just saved the day.
What will you decide? Will you buy him ice cream? Or maybe invite him somewhere else? Perhaps you should first earn his trust, and even though it might not seem like it and he doesn't say it openly, it won't be easy.