Actually, this ending isn't that bad. There's a channel called Haruhi Archive that uploaded all the endings of the game. If you like Haruhi, I recommend watching it.
The name of the song in the soundtrack is "やさしいこだとおもってた 〜ポニ子〜" which translates to: I Thought She Was a Kind Child 〜Poniko〜. The official English translation used on the vinyl is "Poniko" but I have preferred to translate the original Japanese titles into English. In the description are the real titles.
emi kept hisao healthy and dependable rin showed hisao a new way to see life lilly nurtured hisao and his resolve as a person hanako taught hisao to not always be a hero shizune tortured hisao with student council duties misha assisted shizune torturing hisao with student council duties
"The first stage theme has a heavy atmosphere. Many shooting games have really energetic first stage themes, and this song is, too, but it's so dark. Even though the story of this game is humorous, the music is so serious, and the enemies are tough. I like that kind of mismatch." - ZUN
