Mysterious Flu (S01E07)

Following an impressive performance on the track, Mikoto is invited to join a relay for the upcoming sports festival. However, she declines, as it would mean missing her walks home with Akira. As winter uniforms come into style, Akira catches a cold. Inspired by Ayuko's story of wearing a bikini to aid Kouhei's recovery, Mikoto dons a bikini beneath her coat and gives Akira some of her saliva, which surprisingly helps him feel better. On the festival day, Mikoto leads her team to success in the relay. Although Akira encourages her to join the track team, she still refuses, valuing her time with him more.