Oh, you know what, blondie? You can whistle as much as you want. Actually I think you should create a 7 minutes long symphony consisting only of whistling.
Wow , now that's a cliffhanger. Inee made a great chapter, now I can't wait for the rest of the story.
My guess is that Sae , like some one already suggested, might have deliberately killed Harumi/Ena as a cupid to get her in the cupid ranks, we'll have to wait to see why she did it. But the mere act may have had nefarious consequences on her, as we can see here:
Oh, boo-hoo you have a sob story. Sorry, but no sympathy from me once you start talking out on an innocent girl and making her life hell. She is to Eko exactly what her father was to her sister.