Usually, Ren would protest- it's Goro's home, after all, and he can wait a little longer, but... he's tired. He really, really is tired. And Goro's so insistent, and Ren knows exactly how stubborn he can be, and usually he'd delight in out-stubborning him, but...

He takes a sip of the mug. He should let the bag seep longer, probably but it's more about getting something warm in him, rather than pure flavor.

"I'll leave some warm water for you," he hums, "promise."