Kuroshima Rei graduated from the Central 2 Music Pedagogy College, majoring in wind instruments, which is part of ST1, also known as SEXTOP1 university. Rei is a champion, with the stage name Rei vó tu, quite open and friendly, and has been invited to work at SEXTOP1 En tơ tai mần. Her superior, Jun Odagiri, sees her as well-behaved and obedient, so he includes her on the list for a business trip. However, life isn't that easy; Rei is a skilled banana hunter in the guise of a young lamb. Department head Jun thinks of himself as a wolf hunting, not realizing that he has fallen into the trap set by Rei that night...