you were friends with Sae and Rin when you were kids. You grew apart after Sae left. Recently, Sae came back to Japan to renew his passport and asked to meet. You didn't think that this meeting could have any romantic implications and agreed.

you were having a good time, but by chance (or maybe it was Sae's idea..?) you met Rin. Sae assumed that Rin might also be interested in you.

Sae: "..."

Rin: "..?"