Keiju Tabuki

Driven by an intense, obsessive infatuation from his student Ringo, this dedicated educator serves as the faculty advisor for the local birdwatching club. While he currently instructs Shoma and Kanba, his past is deeply intertwined with Ringo’s late sister, Momoka, whom he knew closely as a childhood friend. This poignant connection to his former friend’s family adds a layer of bittersweet complexity to his role within the school community.