Clear (クリア, Kuria) is a Japanese adult visual novel developed by Moonstone which was released on August 24, 2007 playable on Windows as a DVD.

The gameplay in Clear follows a plot line which offers pre-determined scenarios with courses of interaction, and focuses on the appeal of the five female main characters.

Before the game's release, a manga based on the story, drawn by Japanese artist Yukiwo, was serialized in the seinen magazine Comp Ace.

[1] The game's text is accompanied by character sprites, which represent who Kōichi is talking to, appearing on top of background artwork.

[1] Throughout the game, the player encounters CG artwork at certain points in the story, which take the place of the regular background art and character sprites.

[1] Every so often, the player will come to a "decision point" where they are given the chance to choose from options that are displayed on the screen, typically two to three at a time.

Kōichi comes back from Tokyo to this very ordinary and small island off the coast from mainland Japan and lives with his grandfather.

Planning and scenario was headed by Kure, whilst Mitha and Endori worked on character designs.

Clear was first introduced in Japan, in limited and regular editions, on August 24, 2007 as a DVD playable on a Windows PC.

On May 3, 2008, Moonstone released a fan disc titled Clear: Crystal Stories (Clear～クリスタルストーリーズ～, Kuria ~Kurisutaru Sutōrīzu~) for Windows PCs as a DVD.

Despite the manga being released before the visual novel, the story is based on the game and is illustrated by Japanese artist Yukiwo.

The game has two ending themes: "Crystal Love" sung by Kazko, and "Brilliant Days" by Riryka.

There are also three insert songs: "Bitter sweet pain" by Haruka Shimotsuki, "Eternal" (エターナル, Etānaru) by Rekka Katakiri, and "One-way Shining" by Chata.

[10] A free drama CD entitled Dokii Onna Darake no Onsen Ryokō (ドキッ☆女だらけの温泉旅行) was distributed at Clear promotional events in Osaka and Tokyo, Japan in May and June 2007.