Yu-yuru Shikkoubu

Yu-yuru Shikkoubu (ゆーゆる執行部) is a manga series by bomi. It was serialized in Shounen Ace.

Plot
Yukimaru Hana is just starting her high school life, when on the way to class she finds what appears to be a corpse beneath a sakura tree! The 'corpse' is the strange executive office president Asukata Ume. Follow Hana as she gets used to her new school with her new friends, the students from the executive office.