Seeing Amano become more assertive and disciplined in his second chance was nice, even if he didn't remember any of it. It's a little bittersweet since he didn't get to live out a life with Satsuki, but, given that Miyu wouldn't have existed otherwise, I think the ending scenario might be a sort of best case. Also glad that he and Miyu were able to get along even if his relationship with Sachiko remained crappy. Wonder what the time travel model is, seems like there's parallel worldlines but also that some might have precedence? In that the original timeline is the one he returns to and he's most strongly influenced by the memories of the alternate time he spent in the past, while the other worlds don't seem to impact him.