18화: 2학년생들이 홋카이도를 방문하는 동안 쓰카사는 리쿠에게 자신의 병을 숨긴다.

18

All of the second year students go to a field trip in Hokkaido. Tsukasa during the trip is sick and tries to hold it back in order to spend time with Riku. After fainting in front of Riku, he rushes her to the hospital. Meanwhile, Mina is unable to contact Riku with her mobile phone due to him not checking his phone and taking care of Tsukasa. During this time, Riku ignores Sayuri when he believes that both her and Sakurai are in a relationship thus complicating his own feelings. (Source: Wikipedia)