If you're looking for manga similar to Natsuyume Nagisa: Nostalgie (Light Novel), you might like these titles.
he protagonist regains his consciousness to find himself falling down from the sky. As he realizes that he doesn't know why he's here, even more that he doesn't remember anything at all, three girls flying on brooms appear in front of him. Shortly after as he keeps falling he witnesses a tragic battle between these girls calling themselves Etoile and the monsters they call Zodiac take place. Then he dies... and wakes up in front of a TV, that has "Kamisama" (God) written on it, with a little girl inside. She asks him "Do you want to be reborn?"...
Melty Moment follows Takeru as he gets closer to several girls in high school. He ends up leading an election committee that is filled with cute girls. There's shy little Natsuki, serious little Misao, his childhood friend Yuuka, classmate Sumire, and talented Aoi. Who will he end up with?
The Ootoriryouran Academy is a highly prestigious private school well known for it's high academic standards, ruled over by two separate student groups—the Ryouran Association and the Student Council. Katsuragi Shou is the Academy's newest student. He is greeted by fireworks and celebrations, but soon finds that the academy was oversubscribed. The male dorms are already fully occupied, and the only place left for him to stay is the all female Ryouran Dormitory.