ピュアドレイン

Main character is suddenly fired. A fairy appears in front of him promising to fulfill a wish in exchange for finding fairy world's treasure "Jousyu". This treasure is cultivated inside woman body, and making love is required to excavate it. Protagonist decides to infiltrate theater club of a certain academy as adviser to get the required results. Will he keep to his plan or find true love there? [From vndbreview]