Kind of rushed it, hm? I suppose he wanted to avoid controversy with an "underage" girl, but really he should have just had Yabe ram her on her graduation and call that the ending. Still, I had some fun with this manga so all's well.
@LemonLies, there isn't a gap (at least not between 103 and this one) since 103 here is 107 on other sites. I'm not sure what the missing chapters are.