Famitsu screenshots reveal that the part time job will be a rhythm mini-game. You will be behind the counter, facing the screen and buttons will scroll across. Press the button, Tatsuya puts the ingredient in the ramen. Simple.
SEGA has already signed 3 real life models for their Hostess part of the game. Those are Yuu Tejima, An Nakamura and Aya Hoshi. An Nakamura is even shown pole dancing in one of the screens. I wonder how long you have to work at making ramen to get some of that action?
UPDATE: Scans after the jump!