The art is a lot more polished in this serialized version (but of course), but I feel the reduction in the resolution of the images is really hurting the reading experience. Its probably fine on the official mobile app but it's really apparent on a monitor.
I'm pretty sure that in the pre-serialization, the little sister is fully aware of Tsuyu's feelings, and she's even trying her best to help her best friend about it.
I don't know how the romance will go in this series since there seems to be some age gap and if it goes in the wrong direction, it may trip some alarms for some but still, it is a cute, fluffy series that is definitely good for the heart.
I liked the chapter, but it kinda sucks that we didn't see the brother eat her heart-shaped cookie, and that we didn't see Tsuyu's reaction either. On a completely different note, Chie looks really cute here: