I love how quickly the manga moves on from the fact that Hatocchi was discovered, as if to say, "C'mon, we all knew this was gonna happen."
Also, all Momo says is "Well, Rin told me-", and we learn nothing else about how Rin knew that Hatocchi was playing out there in the park, like it's just assumed at this point that Rin knows literally everything going on, and we don't need to know how.