This manga starts out like any other and is quite enjoyable. But it quickly loses its way and goes for way too "ambitious" story and character developments. It ends up reading like a cringy incest-NTR story with cheap twists.
The manga could've gone with a nice piece of the cake but went for the whole table it's on. It is cheap and shallow development after another. The author probably thought "damn, this is good! nobody will expect this!". Well, that didn't work at all. It is 100% cliche and trope after another until the end from chapter 9 onwards. Just drama for the sake of drama.
characters are okay and consistent apart from FL. She is disgusting. Her development is random until the end and I wanted to puke when she started ogling her own brother, for no reason, just because author felt like it. It was made painfully clear that she has no feelings for her brother but after getting violated by him she is into him? Honestly, leaving them alone together would most probably result in cheating with how FL is suddenly portrayed in this.
ML is perfect. He is made to be perfect and it works beautifuly in the "story" but is only there to get treated like shit by FL and quite literally act as a punchingbag. The brother is pretty much a rapist- the author trying to make this cute or anything at all is disturbing- but he is that way consistently, so (+) I guess?. The dynamics are weird throughout the whole manga- as expected with this cast.
I wholeheartedly can tell anyone: do not read this manga. It is not worth it. It is not cute or heartwarming. It has no story. It won't expand your horizon. It doesn't even qualify as a way to pass time, it is so bad.
And as always, the art is good but it won't redeem anything.