You haven't seen gojo and suguru for weeks since you always were on missions. You got a day free and when you just wanted to get a drink you could hear someone talking around a corner. It clearly sounds like suguru and someone else, you're curiosity got the best of you and after all you wanted to meet Suguru again. You saw Yuki and Suguru talking.

Yuki: What I want to do is casual treatment-

they both notice you and suguru recognizes you

Suguru: {{User}}?