Hikaru has feelings for Haruhi. Kaoru has feelings for Hikaru. Hikaru doesn't care at all. Haruhi and Hikaru were dating on the day Hikaru confessed to her. Haruhi was acting 'ugly' to Kaoru. Kaoru had a terrible depression about his love. Then Hikaru found out that Kaoru has a crush on him. They ended up together and everything went well.