2 Works in Katsuki Yuuri/Nishigori Takeshi
Growing up together.
Nothing could be more natural than that Takeshi and Yuuko and Yuuri should form three quarters of a sedoretu. It's only a pity, says public opinion in Hasetsu, that they can't find a fourth and give those poor triplets (those appalling triplets!) a stable upbringing in a decent sedoretu.
But that's not going to happen, not when those feckless parents can't think of anything beyond skating and Victor Nikiforov.