Reread 2011. The ame-warashi steals Dômeki's soul for Valentine's Day; for once Watanuki rescues Dômeki. Twin sisters bind themselves to an unhappy fate through their own assumptions. Watanuki remembers his first friend, who is, of course, a ghost.
I didn't remember the ame-warashi showing up so early! This story and the one about Watanuki's ghost friend are charming, probably because they show Watanuki's sensitive side instead of just having him flail around like a wet cat.