From Chibi Manga:
Saho Kasumi is a transfer student. The new school she’s going to is divided into four buildings: Spring, Summer, Autumn and Winter, led by four good-looking guys. On her first day, Saho is assigned to the Spring building. She almost gets kissed by Arashi Somei. Saho’s perplexed, but there seems to be a reason… The four handsome boys from noble families struggle for one girl; youth X a forbidden love fantasy!!