Episode 24 of the second season. Especially because of the lyrics of the song the club sings at the end.
- Especially the last two verses:
At the train station, on the path by the river, no matter how far we are, we can look up to the same sky and sing as one!
But you know, I met a wonderful angel. Graduation isn't the end, because we're best friends from now on.
If you say "I LOVE YOU!", we'll reply "WE REALLY REALLY LOVE YOU!!" We won't lose anything, forever and ever we'll always be together.