Over Time 

This is about a lazy ass kind of a baseball player, Taro, and A very serious crazy baseball player, Takami, that want to make it to the top. They cross paths on a bus that crashes. Takami dies and Taro lives. Taro visits Takami's grave and sees Takami's ghost. His ghost tells Taro to take him to the koshien and fulfill his dream. Think of it as Taro no Baseball. (Source: MangaUpdates) Included one-shots: Usagi to Kame to Strike, Cross Beat, Live Alive