4th time reading this series and it always kind of annoyed me a bit when Shiine keeps saying their kisses say it all, but they been kissing from the start and it didnt conveyed much the most important part. But Shiine avoiding Ichika for over a week was dreadful. Imho, she lost 50/100 points as a character tbh.
Also, ive could never understand how Shiine completely ignored Ichika confession while sick. Sick or not she was saying what was on her mind.
In the end, ive always try to brush to the side the flaws considering is their 1st love and they're young.