It only took 10 chapters until an annoying 3rd wheel appears. And, of course, it just has to be one of Hotaru's old classmates. It sure looks like he's going to try to split up Hananoi and Hotaru. There'll probably be something in Hananoi's past that he'll remember and use to try to cause Hotaru to be afraid of Hananoi.
There was one thing I am a bit unsure of. When Hotaru said, "I think I know why I couldn't tell Hananoi-kun I liked him," was she admitting that she had actually liked the 3rd wheel and lied to Hananoi, or was she referring to Hananoi, himself? It seems a bit ambiguous, particularly after her dream.