Chapter 4 - Swimming with Kashiwada-san and Oota-kun

Synopsis
The chapter begins in the middle of swimming class, with Oota winning the boys' relay. Oota, Sada and Tadokoro then wonder if Kashiwada can swim. Kashiwada ends up swimming in a very weird way, which makes her look like she is drowning. The teacher then asks Oota to teach her, but Oota refuses. Sada then implies that he'd teach Kashiwada and Oota immediatley begins teaching Kashiwada. Oota let's go of Kashiwada as a prank, but Kashiwada pulls on his swimming trunks. Kashiwada is later able to swim a little, but ends up almost drowning. Oota jumps in to save her, but since Kashiwada loosened his swimming trunks earlier they fall off.