Can Can Bunny 6 - I ♥ Mail

Imaginary city "Shibuya". Mobile phones received a universal spread, and main character decides to get acquainted with modern technologies after a year and a half of job hunting to get advantage at job interviews. After buying mobile phone he wins navigation communicator called "Monaco" and a CD-ROM from mobile phone manufacturer. It turned out to be a cute girl application!

[From vndbreview]