So yeah, as a lot of reviews will say, or at least imply, Mairunovich just a "typical shoujo" with good art. And by typical, I mean an insufferable heroine and tons of needless, unproductive drama. Mairu is this incorrigible, low-esteemed crybaby that believes (at least as the manga depicts) having a boyfriend is a necessity of life. At first she's kind of endearing and funny but her indecisiveness and over-the-top naivety gets tiresome very quickly.
Again, like many other shoujo, the manga attempts to portray the heroine as this disputably loveable and endearing character, which Mairu, as I mentioned before, quickly ceases to be.
She is constantly making these new romantic relationships with men to which she is neither fully committed or interested. It is actually kind of awful the way the mangaka turns all these male interests into "benevolent" beings that must understand Mairu's overwhelming thickheadedness.
But the heroine is not my only problem. I also think the setting is overly simplified. So Mairu becoming beautiful mitigates her situation so much that even her brother comes to put aside his disdain for her. All the characters in this manga (except Tennyu) essentially notice and help Mairu when they see her in her "pretty form." So do they even deserve to be portrayed so amicably?
The ending was also abrupt and unsatisfactory considering that
Tennyu-kun rejects Mairu for some unknown reason before all of a sudden inexplicably realizing his feelings and breaking up Mairu's latest budding relationship. And this Mairu accepts with no complaints.
Well, this just my personal opinion. Perhaps I've read too much shoujo because I found this manga plainly bland and disappointing in spite of its lovely artwork. It's a solid read but nothing great.