[Locked] manga title

i know it's on fakku but i can't seem to find it, so here i ask:

i'm looking for a manga were the story take place in a school, a guy open a door to a clubroom/storage room and surprise a girl touching herself. She seem to be exploring her sexuality and ask him (or he ask her if he can) for help. Later, in their classroom, she send him little papers (she sits next to him) to continue their little exploration together in the same place, followed by more sexual play in the little room. At the end, she sends him a little paper with a "i love you" wrote on it, or something like that.

please halp!

ok, copy/pasting it there. I though the request section was only for requesting manga to add to the website, not already existing manga.