ef: A Tale of Memories., KimiKiss Pure Rouge Recommendations
Both are similar in the way you have more than one main character.
The story revolves around all of them, following each of them at different times, their expedition and their relationships.
Kimi-kiss is simpler and more straightforward than ef - a tale of memories!
Both of them are visual novel adaptations that often times feel more like shoujo than eroge; heavy on the romance and drama with a light sprinkling of moe.