あねトレっ！～お姉ちゃんとHなトレーニング～

Keisuke is a university student. He lives alone and enjoys his school life. One day, his cousin, Itsuki, suddenly comes to his apartment. "Let me stay here until I find a place to live." And he reluctantly begins to live with her. One day, he accidentally sees her naked body. But he has a secret that he only gets sexually excited by anime or game characters. She is surprised to hear that, and tells him, "I'll give you sex lessons then...."

[From [url=https://web.archive.org/web/20090106014727/http://www.erogeshop.com:80/product_info.php/cPath/146_49/products_id/1008138]Eroge Shop[/url]]