I damn near started crying when we see that panel of the four of them on p15 and Kasumi was so much smaller than the others, on top of her meek apology to Haru in her shame of that moment. She looked so small, and yet she owned up and came back on their walk home.
I did shed a tear at Kasumi's whole hand holding onto Haru's pinky, though. The light and brightness of them walking, and Kasumi divesting herself of that worry of feeling both duty-bound to let Haru go while being hopelessly jealous at the very thought, into being able to breathe again upon hearing Sayori had someone - so much visual joy just poured off the page in that whole scene, right down the Haru's radiant smile when Kasumi affirmed she loved her (and the unambiguous kind, no less).
This is definitely taking a turn with the private focus shifting back toward Mizuki & Sayori in the second half, but for now I feel like Kasumi & Haru's resolving moment and affirmation of how they feel, made me positively bouyant.