KimiKiss

KimiKiss (キミキス, KimiKisu, lit. "First Kiss") is a dating simulation game for the PS2. Released by Enterbrain in 2006, KimiKiss has become a media franchise, including manga and light novels.

It then has been made into an anime adaption called Kimikiss: Pure Rouge as of 2007-2008.

Plot
Kouichi Aihara is a high school student who just came back from summer vacation. He has never been kissed and after returning to school he decides to develop a romantic relationship with a certain girl during 30 days.