The first thing that got to me was how much Letty's and Suwako's cloathes look so much alike apart from the skirt. I had to do a double take from the previous comics just to make sure they really arent the same.
Lets see... Spring - Summer - Autumn - Winter I've noticed a pattern of some sort. Spring, or Lily, treats the Aki sisters unlike she does the others. Summer, which is Yuuka treats Letty unlike the others as in, more close and less violent/sadistic. While Autumn seems to do fine with everyone except for Lily since Lily like to troll them. Winter, which is Letty, gets especially loved by Yuuka. So do you people think this is planned or is it just by chance?
Mother.... wha?Huh? Those kids...Come any closer and I'll smack you!!Sounds like a deal to me!Aya~ how cute!I decided to come over to meet you!Sanae~Oh, Letty, you came, too?Let's go home.After schoolAh, mother!Dangerous to touchWhy!?