Junjo Romantica Season 2 Episode 6 A Picture is Worth a Thousand Words

When Hiroki discovers Nowaki and Tsumori in a compromising position, he's not sure what to think. Nowaki tries to explain, but Tsumori doesn't seem to want to help clear up the matter. When Tsumori casually mentions that Nowaki is thinking of moving out, it jars Hiroki. Is Nowaki leaving him?