Looking a bit embarrassed, Mayu-chan has slightly damp armpits. Even before being touched, she's fidgeting, and that reaction is already adorable. Her whisper-like laugh, saying "...it tickles...!" is incredibly arousing. Though her voice is reserved, her body's reactions are quite honest—her twitching and jerking clearly show she's trying to hold back. She seems quiet, but in reality, Mayu-chan is quite weak-willed.