Pii Natsu ga Ippai

Natsume falls in love at first sight with Rui, a handsome boy she sees by the school gate on the first day of her second year of high school. Around the same time, she befriends Chiyako, a beautiful transfer student who turns out to be Rui’s older sister. Chiyako is determined to become Natsume’s best friend, and Natsume welcomes the friendship as a chance to get closer to Rui. Through Chiyako, Natsume learns that Rui is younger than she is, her school underclassman, and a professional model. He is spoiled, moody, and often unpleasant—and he thoroughly hates summer. None of that puts Natsume off. The cheerful, plain girl now hopes to win his heart.