Professional Childhood Friend Yanami Anna's Style of Losing Kazuhiko Nukumizu is a high school student who has no experience being in a romantic relationship, instead spending his time reading light novels. While at a restaurant, he witnesses a quarrel between his classmates Anna Yanami and Sōsuke Hakamada on the latter's relationship with Karen Himemiya. Anna confesses her feelings to Sōsuke before he runs off to see Karen, leaving her dejected. Kazuhiko attempts to feign ignorance until he is noticed by Anna. She sits beside him and begins venting about losing Sōsuke to Karen, then forces him to pay her bill when she sees she can't afford it...