A pebble and a river. She's one and he's the other. Whichever, pebble or river, he wants to be by her. Either driving or watching her drive. Drive through his rough surface, and smoothen it. She doesn't know she's his river.
A girl falling in love with her best friend. Her life starts to go haywire. Her best friend, or boyfriend, starts to fix up her life, and plans a master plan to unleash, so as to bring them eternal happiness.