O-Chan no Oekaki Logic

• Developer — Sunsoft • Publisher — Sunsoft • Series — Hebereke • Platforms — PlayStation Sega Saturn Super Famicom WonderSwan Palm OS Mobile • Released — PlayStation September 8, 1995 Sega Saturn November 17, 1995 Super Famicom December 1, 1995 WonderSwan January 6, 2000 Palm OS Mobile • Genre — Puzzle Nonogram • Modes — Single-player is a Japan-exclusive puzzle game based on the popular nonogram game. The game is considered to be a spin-off of Sunsoft's Hebereke series. Its first release was on the PlayStation on September 8, 1995, and would later be ported onto other platforms ever since. The game has received 2 sequels. It is the only game in the Hebereke series to feature Utsuzin as the main villain, rather than Unyohn. A European version, named Oh-Chan's Logic, was planned, but was cancelled.

O-Chan and Hebe are walking on a grass field. All of a sudden, Utsuzin suddenly captured Hebe in a UFO. O-Chan tries to run after him, but she's too late. Then she ventures to rescue Hebe from Utsuzin's lair. The ending shows O-Chan waking from her bed, indicating (but not explaining) that it was a dream.

• Illustration — Screenshot from the Super Famicom version. The game presents the player with a puzzle grid. The player should chisel the grid; if done correctly, the player will win the game. The game also has a multiplayer mode in which the player must chisel the grid in order to beat the other player. The game even has an edit mode in which the player can create their own puzzles. The Sega Saturn version included a story mode in which the player must verse opponents that come out of their way. The player can also complete to get better times on that mode, as they are timed. The game has a tutorial mode, which teaches the player how to play the game.

On September 27, 1996, was released on the PlayStation. It was also ported to the WonderSwan on January 6, 2000, though the "2" was dropped from the title, as it was the only game in the series released for that platform. The game featured new puzzles, music tracks, and updated visuals. The game also added a painting mode, in which the puzzle grid must be filled with color.

The final entry in the series, known as, was released on January 11, 2001 exclusively on the PlayStation. The game uses the same engine as the first game, featuring more levels; the game lacked the additions the second game had.

was released in 2004 for mobile devices. It was the final game in the Hebereke series for over 20 years. Little information is known about this release. As its name suggests, it is a remake of the first game.