@liquidsword I admit I phrased it weirdly, but you apparently missed the character sheets. The soccer kid IS, in fact, the younger sister of the friend of the cat girl. They ARE, in fact, sisters.
I'm saying that is contrived. It is contrived because it is unlikely for him to have met so many interconnected people completely independently of each other. Do you have a friend? Does your friend have a sibling? Have you ever met that sibling? If so, the chances are that you met your friend's sibling THROUGH your friend, not completely independently. I'm giving an example; it should still make sense even if that has never happened to you personally.
And yes, I get that coincidences happen. I'm fine with that. However, after a certain point, it becomes too many coincidences. Meet two connected people (such as siblings) independently of each other one time? Okay, sure, that's understandable. Happen a second time? Okay, coincidences still happen. Third time? Stretching it.
There is no hard and fast limit. It's just whatever you feel like is too unlikely and improbable. And here, we know that the author is literally planning this out. That means the author wanted it to be a stack of coincidences.