The Textbook Won't Teach You

"Kyoukasho wa Oshiete Kurenai" is a romance manga anthology exploring unconventional relationships and the hidden emotions that textbooks simply cannot cover. In "Toumei na Jikan" (Transparent Time), the ghost of a deceased high school girl named Yuuri inexplicably haunts her late boyfriend's younger brother rather than lingering around her lover or enemies, raising questions about her true intentions. Meanwhile, "Okubyou na Kimi no Te" (Your Cowardly Hand) follows Shino, who attempts to drive away the persistent Takeomi by declaring she will not engage in any physical contact—not even holding hands—until marriage. When he surprisingly agrees, their relationship flourishes until Shino's first boyfriend reappears and exposes the genuine reason behind her strict rule. The titular story, "Kyoukasho ni wa Notte Inai" (Not Written in the Textbook), centers on Hinokawa, a student who believes that learning about love is just as important as academic studying in high school. Eager to discover what textbooks leave out, she directs her romantic affections toward one of her teachers. However, he does not respond to her advances in the way she hopes, forcing her to navigate the complicated reality of unrequited feelings. Together with "Kanojo no Tabaco" (Her Cigarette), these interconnected tales offer a poignant look at youthful longing, unexpected attachments, and the lessons learned outside the classroom.