Not Bad Big Brother / Elementary School Student Council.Kotomi is being lazy in her room during spring break, a week before the entrance ceremony. Shino, Aria and Suzu comes to Tsuda's house to give Kotomi congratulatory presents for enrolling, which happens to be books, books and more books. Kotomi tries to tease Suzu about walking with Takatoshi to school, though surprisingly, her tease is spot on. Various front of gate moments. Toki comes to school wearing a t-shirt, yet she forgot to take off the price tag. Kotomi realizes that her brother is popular with girls, though he replies that they are just people he occasionally interacts with, as she misunderstands the statement. Suzu and her height jokes. Yokoshima complains about being disrespected, while acting indecently. Student council cleaning day jokes. The Ousai Academy Swimming Contest is going to start, so the student council cleans the swimming pool. Mutsumi, Suzu and Shino win their respective races. Various missing items in the pool jokes. While looking at Shino, Kotomi says that she might be a new genre "taikou moe" character. While Shino was in Ousai Elemental School, a new trainee teacher named Koyama transfers in for two weeks. Shino surprises her from the start by asking private questions and mispronouncing phrases.