This is a newer manga (only 2 volumes released in NA so far with the third coming in May). In three basic words: just another shojo.
Ageha and Hana are twin sisters who were raised separately. Hana was raised in the city with her parents but Ageha was raised by her grandmother in a more rural setting. When Ageha was in the second grade, her grandmother became to ill to raise her and so she ended up living with her parents in the city. The two girls are totally different- Ageha is a more average tomboy and Hana is a beautiful social butterfly. Now that the girls are in high school together, Ageha finds herself excluded from almost all social
activities. When she is left alone to tend the classroom during the school’s fair, a somewhat mysterious man named Kyuu comes running into the class to try and hide from a group of girls (it turns out he’s the hot new young guidance counselor). He asks for coffee and flips through Ageha’s planner- finding a picture of Ageha with her long standing crush, Ryuusei. Kyuu tells Ageha to follow her heart, making her shout out that she’s Ryuusei’s girlfriend and that her life is great. Just after she does this, Ryuusei appears and recognizes Ageha from their childhood. A relationship begins to form between the two, but her beautiful sister decides to step in between them.
Miwa Ueda is best known for her work on the series Peach Girl, and to be frank I’ve seen little new in Papillon. It’s a very typical, tried-and-true (and tired) shojo storyline of the ugly duckling gaining confidence in herself and winning the guy. Appealing for those people who a) liked Peach Girl or b) like the stereotypical shojo fare. It’s not anything groundbreaking or new; this is the same storyline that has been done time and time again and it doesn’t seem like Ueda is going to really do it any differently. The one bonus to this is, as is typical with Ueda, the artwork. Her style is unique and beautiful. Unfortunately, this is a manga I’d rather look at than read unless I’m looking for a quick-and-trashy beach read. Moreover, it is exactly the type of shojo I *dislike*, reinforcing the “girl is no good until a guy is into her and she’ll be helpless when he’s gone” stereotype. A very superficial storyline.