S4·E3 August 31st: The Final Visitor of Summer Vacation / September 1st: Mochi Sweets

Yuno and Miyako's plans to spend the last day of Summer having fun is thwarted when a typhoon settles in, so everyone retreats to Hiro's apartment for some food. Afterwards, Yuno looks over her summer homework. As school resumes the next day, a fire drill is held, during which Nazuna feels the need to go to the bathroom.