Sōma invites Himeko to the amusement park on a date and Chikane tries her best to help Himeko prepare for her outing. While on their date, Tsubasa, the First Neck of the Orochi, attacks the couple as Sōma tries his best to protect Himeko.

Sōma initially gets defeated by Tsubasa in their first fight and Tsubasa promises to return again. In the meantime, Sōma trains to get even stronger for their next fight. It is also revealed that Tsubasa is in fact Sōma's biological older brother.