The main arc in my opinion has a really good storyline. Yoshinaga-sensei, in my opinion, was able to explore the bitterness of an unrequited love in a sweet way with the elaborate characters and back story of each characters. Unfortunately, if you're more of a visual person like me, this manga is a tough to read because, I swear to god, I felt like reading a novel; the manga are mostly text.
And if you haven't know, this manga had been adapted into TV series in Japan movie in 2001 and movie in 2008 in South Korea.
Antique Bakery