Just came back to this after mot reading since the early academy chapters (around 90 or so...

Just came back to this after mot reading since the early academy chapters (around 90 or so), and I have to say I’m disappointed with how it came out. I didn’t mind the romance between female mc and guardian, they were cute, but how did the story go from having 2 MCs to only the sister being the mc and the brother was basically swept under the rug?? It looks like the author read too many romance manga after chapter 100 and decided to basically change the genre, plot and ending beaded on that. Also, the whole duckling analogy makes no sense because they were basically leaning against/ protecting each other from the get go, he isn’t the older brother who raised and protected his sister till she grew up… it doesn’t sit right with me how he was just set aside to achieve a romance based ending after all this time Σ( ￣□￣||)