I won't go into specifics but...
-eclair cancels haruhi's debt
-tamaki got engaged because the grandmother would accept his mother and let him meet her
-eclair tried her best to keep him away from the club and its members
-kyoya called tamaki's house and talked with shina she told him he was leaving for paris and they see him in a sports car with eclair
-they go after him but are stopped by the ohtori secret police the twins and haruhi leave in the carriage while the others stay and fight
-hikaru gets injured and kaoru goes to check on him haruhi remembers her father's advice and goes after tamiki herself
-she catches up and calls him an idiot and that the club needs him after he says he was only causing them problems
-haruhi gets tossed off the carriage and off the bridge tamaki wants to go after her but eclair tries to stop him after she sees it's useless she lets him go and he thanks her
-after the members reunite, later that night they all take turns dancing with haruhi while tamaki and kyouya's father talk about the situation with the tornerres, they end their conversation after kyoya's father says haruhi will marry into his family and tamaki's father says that won't happen
-and in the end the club members watch the fireworks go off in the night sky