A new ganguro student, Ran, transfers into Yoshinao’s class! As it turns out, she and Yoshinao used to be childhood friends, and once reunited, they soon become lovers. However, both the public morals committee chairman, Saotome, and the student council president, Charlotte, start to make a move on Yoshinao, who suddenly finds himself surrounded by a harem. Not long thereafter, a new strain of pneumonia begins to spread, and the gang are forced to stay at home while lockdown measures are being implemented.