Growing up, Sasahara Tomo always felt like she belonged with the boys, spending her time rough-housing and hanging out. Despite privately wishing she could be more feminine as she entered elementary school, she maintained her tough exterior, too ashamed to reveal her true feelings. But when a love confession was rejected due to her lack of femininity, Tomo was ready for a fresh start, entering high school with excitement for a whole new environment. Unfortunately, her plans are foiled when she crosses paths with Shimazaki Akira, a former next-door neighbor whose sibling-like relationship is starting to blossom into something more. However, their "forbidden" love faces several challenges, as Akira is not only 23 years old but also Tomo's class advisor.