These stories revolve around Kouichi Aihara. Every volume stars Kouichi and another girl who each share a romantic story. 
Volume 1 = Mao and Kouichi 
Volume 2 = Asuka and Kouichi 
Volume 3 = Mitsuki and Kouchi 
Volume 4 = Eriko and Kouichi 
Volume 5 = Yuumi and Kouchi 
Each story is seperate from each other.

A manga adaptation of Eriko's route in the Kimikiss game.

This manga adapts Yuumi's route from the game Kimikiss.

Short stories of the heroines of Kimikiss and their love lives. Each chapter features different heroine.

Kouichi Sanada and Kazuki Aihara's childhood friend Mao Mizusawa has returned after living in France for a couple of years. Kouichi is surprised to learn that, since her parents are remaining overseas for the time being, his mother has agreed to let Mao stay with them. The three friends help each other deal with the ups and downs of high school romance.
 
(Source: Anime News Network)

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