Is this hentai manga still existing ?

I'm wondering...
Because I searched for months a hentai that I fist saw in 2013 or 2012 (when the content was mostly free, don't know if it's linked to the fact i don't find this anymore... ?)

A quick description could be :
Time is cold, a school girl is waiting for a bus, for a reason that I don't remember anymore, she start at jerking at a young guy (older than her, young teatcher stereotype) in public. He end cuming in her sleeve.
They climb in the bus after this, and she give him a BJ, no one is seeing them.
Than they do their things, the girl start loosing control of her body.
They reach the school with the bus, and I don't really remember but the girl traped the guy in some way... my mind is fogged by the time ! :P

If someone manage to find this manga, i would be so happy ! I bet everyone know this feeling when you have been searching a old thing for a long time and finally put back your hand on it, it feels so damn good ! :)

PS : I searched with every TAGS related to the scene and did not find it.