I think it was a bit like a parody of shoujo mangas. I mean, these things like boy trying to befriend a lonely girl, then the girl coming back after years, a dramatic end... I know it had non-shoujo motives too, but~~
The guy looked like gintoki, i was wondering who the girl looks like, turned out to be zura ×D this was a love story between gintoki and zura in another universe ×D