S1's tall and slender beauty, ' Mitsuha Ashitaba', takes on her first full-scale NTR drama! Mitsuha, who moved to Tokyo from Tohoku to work as an office worker, has a boyfriend of the same age back home. Then she goes on a business trip alone with her male boss. It's her first time experiencing this, and she makes a mistake with the arrangements, and ends up sharing a room with her boss... Mitsuha tries her best to keep up with the alcohol, which she doesn't like, but ends up getting drunk and being taken by her boss. Despite the worries of her boyfriend from back home, she is swayed in both mind and body by the adult man she is experiencing for the first time...