Hina usually doesn't wear a bra at home. Whether it's because she dislikes the feeling of being constricted or simply wants to relax, her father can't quite tell. Seeing his daughter's developing body every day is taking a toll on both his mind and body. Even though they're family, this everyday situation begins to trouble him—yet the more he tries to ignore it, the more unnatural thoughts creep into his mind. As this tension continues, he starts to feel the need to reflect on himself.