Mina is bored and has no place at home, so she devotes herself to work to relieve her loneliness. - Her colleague Asano falls in love at first sight with Mina's kind and sincere demeanor and exceptional beauty. - Asano proactively talks to Mina to cheer her up when she sees the sad expressions she sometimes shows. - Such a strong and single-minded feeling melts Mina's cold heart... and she steps into a line that she must not cross.