So I've been wracking my brain trying to remember what the doujin was called. It starts with a guy trying to start a garden at his school. The female school president says she will help him but turns down his request. Then she ends up blackmailing him into sex in order to start his club. I think it was one chapter out of a longer series but can't remember. Thanks for the help.

I don't know, but this deserves a bump if it helps you. Sorry if it's not allowed here, it's just that your answer to one question of mine elsewhere was too great. I hope someone helps you if you don't know it already!