The story might not be unique or interesting, but the characterisation and development well and truly carried this manga to be part of the creme de la creme of romance mangas.
Art is nice and simple, though undoubtedly lack detail and refinement. But not that bad to the extent of not wanting to read it.

The characterisation is good, characters are quite realistic and all that. But the most well excecuted aspect is the character development. It's nice and smooth, no retarded, abrupt and unrealistic developments.

Just like how you crave your favourite snacks, you will certainly be addicted to this manga and start craving.