[As Shun takes the flowers from him, Ren hesitates in moving right on to starting another batch. He intended on eyeing Shun for a few moment moments to see if he could figure out what seemed off about him, but actually, Shun manages to successfully distract him from that.]

You didn't ask him if he wanted to join us?

[That seems like it would be the practical thing to do, so he wouldn't have to add more lessons into his schedule. But while he is a little surprised, he definitely doesn't sound upset at the missed opportunity. He's really come to enjoy spending that time alone with Shun, and he's just happy he won't have to share--and that Shun didn't even think of making him share. He really doesn't want to share, especially not with someone he doesn't know. Maybe if it was Yuto, if would be okay...]

That's probably a good idea. I don't think I could concentrate if someone else was there.

[That's definitely a lie, but he's just going to pretend it isn't as he finally reaches out to start collecting flowers again.]