To Heart is a Japanese romance eroge visual novel developed by Leaf and released on May 23, 1997 for Windows.

The gameplay in To Heart follows a plot line which offers predetermined scenarios with courses of interaction, and focuses on the appeal of the eight female main characters.

The original PC release of the visual novel was titled To Heart, but the anime and the PSE versions later changed to ToHeart without any space between the words.

He encounters ten pretty girls, including his childhood friend Akari and a maid robot Multi HMX-12, and must make the right decisions so as to win their hearts.

[1] Its gameplay requires little player interaction as much of the game's duration is spent on reading the text that appears on the screen, which represents the story's narrative and dialogue.

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

To Heart follows a branching plotline with multiple endings, and depending on the decisions that the player makes during the game, the plot will progress in a specific direction.

Text progression pauses at these points, and depending on the choices that the player makes, the affection rate of the heroine associated with the event will either increase, decrease, or remain the same.

[2] The third minigame, titled "Ojō-sama wa Majo" (お嬢様は魔女), is a side-scrolling shooter game featuring Serika Kurusugawa.

[1] After completing Shizuku and Kizuato, main planner and scenario writer Tatsuya Takahashi began conceptualizing the third entry to the Leaf Visual Novel Series, which would later become To Heart.

[1] Early in development, Takahashi consulted frequent collaborator Tōru Minazuki for the creation of the story.

The two originally considered creating the story and characters entirely by themselves, but after Minazuki expressed his concern that having only six heroines is not enough to exemplify a romance theme, the two asked writer Saki Aomura and illustrator Hisashi Kawata to assist in the project's development.

Several changes were made to the PS version, including the removal of adult scenes and additions such as voice acting, new and rewritten scenarios, a new heroine named Ayaka Kurusugawa, and bonus minigames.

[1] Takahashi stated that the addition of voice acting was decided upon early into development, but because of the high amount of memory needed to store the voice acting's audio files, the decision caused the development team to debate between using higher quality audio or a smaller number of discs.

The visual novel also received a version playable on the PlayStation 2, when the game was released as part of To Heart 2's limited deluxe pack on December 28, 2004.

[11] A remake of To Heart featuring 3D graphics for the characters is planned for release in Japan on Windows and the Nintendo Switch in Q2 2025.

[13] The book contains a comprehensive walkthrough for the entire To Heart visual novel, along with a gallery of all the obtainable CGs, as well as stage-by-stage descriptions of all three bonus games included in the PlayStation and PSE versions.

A manga adaptation based on the original To Heart visual novel was illustrated by Ukyō Takao and serialized in MediaWorks' shōnen manga magazine Dengeki Daioh between October 1997 and December 1999; the chapters were later compiled into three bound volumes published under MediaWorks' Dengeki Comics imprint.

[14] A manga based on the anime adaptation To Heart: Remember My Memories was also drawn by Takao and was serialized in Dengeki Daioh between November 2004 and July 2005; one volume was released.

A thirteen-episode anime series adaptation produced by Oriental Light and Magic and directed by Naohito Takahashi aired in Japan between April 1 and June 24, 1999.

To Heart was licensed for North American release by The Right Stuf International at Anime Expo 2004 on July 3, at their panel.

[15] Volume one was scheduled for late 2005, but the master's copy Right Stuf received from Japan were in bad shape, delaying the release.

The anime, which was produced by AIC and Oriental Light and Magic, and directed by Keitaro Motonaga, aired in Japan between October 2 and December 25, 2004 compiling thirteen episodes.

63 on the Japanese Oricon weekly singles chart,[21] and the ending theme is "Sorezore no Mirai e" (それぞれの未来へ) by Haruna Ikeda.

A single for the second anime, "Daisuki da yo (大好きだよ) (Into Your Heart)", was released on November 25, 2004 and contains both full and instrumental versions of the opening and ending themes.