At Lilian Girls' Academy, as the new year begins and the third term starts, the absence of third-year students becomes noticeable, and the underclassmen, including Yumi, feel the impending graduation of their beloved seniors. Amidst this, the student council election for the next year is set to take place. Yumi had thought that the three members of the Tsubomi (ブゥトン) would each take over their respective roses, but she learns that a second-year student known as "Rosa Canina" is also running for election...!? This volume also includes a special chapter depicting the chaotic New Year celebrations.