Well, I thought it was funny when he found out what was actually goin' on. I knew what it was while "Senpai" was in her room or whatever thinkin' about it. He was clueless about it until he got to the island. I thought it was funny how he reacted to her while she was in his place before they left XD. It was also funny, the face and sound he makes when he really finds out what's goin' on. After that I'm just left dumbfounded at how weak willed he is to say what he's thinkin'. It's also fun when he slips, haha, what luck. I'm glad none of them went through with it though, especially the two younger boys.
I hope they have a follow up of this. I don't think they will though, given the circumstances of why it was written. Would be nice to see how Sato and Misaki are holdin' up these days. Also would be cool to see how many kiddos that drunkard Yamazaki has pounded out of his ol' lady.