Katakoi x Alliance

研究支持以男性之间的恋爱为重要内容，不能作为女性恋爱核心作品推荐。 The work is explicit male/male BL involving a high-school student and an adult teacher, plus an adult male third party who is Kiriya's unrequited love. The student/teacher age and authority gap is central and must not be softened by the eventual romance framing. 剧情依据：Akito sees mathematics instructor Kiriya from the school roof and falls in love. After finding Kiriya crying and beginning private mathematics lessons, Akito confesses, only to learn that Kiriya has long loved his former teacher Mishima. Akito proposes that he and Kiriya form a one-sided-love alliance. 结局范围：The series is complete in five serialized installments and one collected volume. Licensed listings label installment five the final chapter; public official copy establishes the central direction but does not reproduce every final boundary or sexual scene. 男性关系：male high-school student Akito, adult male teacher Kiriya, and male teacher Mishima form the relationship structure 关系背叛：unrequited-love triangle exists, but no confirmed cheating relationship is established 亲密内容：BL romance; explicitness requires direct reading 参与者：male high-school student and adult male teacher may become intimate; exact acts require verification 年龄与同意：high student/adult teacher age and authority risk 强迫与控制：private tutoring and teacher authority create structural power imbalance; no specific forced act established publicly 暴力与恐怖：none established 待补证：Direct reading is required for exact ages, physical intimacy, sexual content, and whether teacher authority is actively used in the romance. Verify the precise final relationship status and boundaries after the alliance. 基于既有研究资料作出的 AI 评级；未重新抓取外部资料。未知项不表示安全或不存在。