| english title | Perfect Education 4 : Secret Basement |
| original title | Kanzen-naru shiiku 4 : Himitsu no chika-shitsu |
| year | 2002 |
| country | Japan |
| director | MIZUTANI Toshiyuki | |
| actor | TAKENAKA Naoto - 竹中直人 | |
| YAMAMOTO Taro |
| genres | drama erotic category III |
| duration | 111 mins |
| classification | Hong-Kong:  |
A shy, nerdy man, Takeru finds a schoolgirl hooker Lily is unconscious in a Tokyo park, so he decides to bring her home and lock her up in a secret basement. Although Lily is afraid of him, in fact, Takeru didn't do anything to hurt her. After Lily begins to uncover a shocking episode from Takeru's past, she gradually falls for him and they make love in this secret basement...
