Koi no Hajime
Complete | Kato Setsuko,Katou Setsuko | 2000 released
It has a really good story, the art was just too beautiful. Tho, I feel like that it lack something, because it ended so quickly. Wish I could have seen more of their interactions, especially the first couple. JUST TOO CUTE BEYOND WORDS.
Yuki No Shita No Qualia