Looking a little embarrassed, Mayu-chan has slightly damp armpits. She's fidgety even before being touched, and that reaction is already adorable. Her whisper-like laugh, "...It tickles...!" is incredibly arousing. Though her voice is shy, her body's reactions are quite honest. From the way she twitches and tenses up, it's obvious she's trying to hold back. She seems quiet, but Mayu-chan is actually quite weak and sensitive.