So far, Ive only read 2 of this authors works, but both of them were beautiful, interesting and unique. A huge breath of fresh air - none of that cliche romance stuff with generic rise and repeat situations and flat, boring characters.
I really really recommend you guys read Tesugaku Letra if you haven't already. Seeing the characters develop, grow and actually make an effort to change themselfs was very satisfying. They were characters who actually felt grounded, characters who aren't perfect.
I don't care if the older brother has good intentions. He has no right to butt into their relationship like that and owes an appology to both of them after.