I don't want this series to end before they finish what they started, but I get why so many fans are dropping it.
We had so much set up between Shunsuke and Koiwai then suddenly 10 chapters ago Hinaki's personality changed into a bubbly, happy go lucky, kind, loving, supportive person, and it is so obviously the set up to make her into a love interest and Koiwai turned into an antagonist at the same time, leaving everyone reeling.
And that was enough to kill the series in the end, they should of had the romance turn into something instead of Hinaki being forced into this. This whole chapter is "Look how wonderful and supportive she is, wow what an amazing person" and I'm like "WHO ARE YOU?"