Hmm...So in actuality, his Senpai bringing him to this part was him being a great wingman!
He met a girl who was pretty much in the same boat as him, they bonded in that situation, and hey, they certainly have great chemistry. Great ending, too! He stuck with the same girl the whole time and ended up (most likely) pursuing a long-term relationship with her. Good for him! Much respect for sticking to his guns and not getting swept up in this orgy swingers party, and only sticking with the one girl he likes(and presumably she likes him too). Such a happy ending I didn't quite expect from a release like this, so I'm definitely pleasantly surprised.
Also I have to give props to the rest of the guys at the party, they didn't do anything rude like interrupting the 2 during their lovemaking and went about their business. Common courtesy in Hentai?
Too bad about his Senpai though. He seemed like he had a chance with that girl at the end, but nope.

In The End, it seems that two of the (*a-hem*) "participants in today's Swinger's Party have had their first ... AND last ... experience of such a thing; if for no other reason than they (*a-hem, again*) hooked up with each other.

Good Job, Kouhai-kun (you Lucky Bastard).

Hang in their, Senpai-kun; perhaps one day your time will come.

APPROVED!

Poor Senpai! I hope he†˜ll find himself a nice girl... Maybe a sequel will tell...

Lol

This chapter's definitely a home run.