Triangle Heart: Sweet Songs Forever

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Alternative Titles

Japanese: とらいあんぐるハート -Sweet Songs Forever-


Type: OVA
Episodes: 4
Status: Finished Airing
Aired: Jul 24, 2003 to Dec 26, 2003
Producers: Discovery
Licensors: None found, add some
Studios: Seven Arcs
Source: Visual novel
Genres: AdventureAdventure, RomanceRomance
Duration: 28 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 6.101 (scored by 30033,003 users)
1 indicates a weighted score.
Ranked: #89562
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #7336
Members: 7,446
Favorites: 7

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Ranked #8956Popularity #7336Members 7,446
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Episodes: /4


Fiasse is a world-renowned singer. She is now the headmistress of a special Singing School who does a Charity World Tour every year. Her mother left behind a inheritance for her after she died and some shady people are after Fiasse and the inheritance. Bring in Ellis, and two siblings who are master of the swords to protect Fiasse. The World Tour is coming up and Fiasse will continue the show. Ellis, Kyoya, Miyuki and company must protect their childhood friend at all costs.

(Source: ANN)

Characters & Voice Actors


Nakamura, Kenji
Episode Director
Kusakawa, Keizou
Episode Director


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Trust You're Truth ~Ashita wo Mamoru no Yakusoku~ (Trust You're Truth ~明日を守る約束~)" by KOTOKO (eps 2-3)

Ending Theme

1: "inside of a wilderness" by KOTOKO (eps 1-3)
2: "Sweet Songs ever with you" by KOTOKO (eps 4)


Apr 18, 2010
Like most people here, I came to Triangle Heart after watching Magical Girl Lyrical Nonoha. Triangle Heart is the original series that Nanoha was spun off of.

Initial Reactions:
I have to say that overall I was pleasantly impressed by Triangle Hearts. I expected Triangle Hearts to be downright awful when I began watching it. The main stay of this franchise is that it spun-off the Nanoha Franchise. When I began watching Triangle Heart, I just knew I wasn't going to like it. I was wrong.

The action in Triangle Heart is very good. The fight scenes are really what makes ...
Jun 16, 2020
Mixed Feelings
Here's the Nanoha timeline: eroge -> hentai anime -> this anime -> Mahou Shoujo Lyrical Nanoha series. This is the first time Nanoha appeared and although she plays a very small role, her character design is the same as we see in her own series. For anybody to enjoy this, they need to be aware and prepared that this story has nothing to do with the Nanoha series.

1) the visuals are what you'd expect from 2003.
2) there's a lot of censorship with it comes to open wounds. To give you an example, there's a character that gets stabbed to the point where a sword ...
Jun 29, 2016
I've reviewed a lot of the Nanoha franchise. The first series, A's, StrikerS, Vivid and I'm sure I'll review the follow up to Vivid when it comes out. Why am I talking about Nanoha? Well, today's offering, Triangle Heart Sweet Songs Forever, is kind of a prequel but not really. The basic gist of it is that this series started as a series of eroges and OVAs called Triangle Heart. Nanoha's character was introduced as the younger sister of two of the main characters in the third instalment, and the one this OVA was adapted from. It was also the last hurrah of the series, ...

Interest Stacks

14 Entries · 25 Restacks


Recent News

Recent Forum Discussion

About the prequel
animan7 - Nov 24, 2011
2 repliesby Salokannel2 »»
Oct 6, 2016 8:32 PM
Poll: Triangle Heart: Sweet Songs Forever Episode 4 Discussion
gohdan - May 31, 2011
3 repliesby RafaelDeJongh »»
May 7, 2014 7:04 PM
Poll: Triangle Heart: Sweet Songs Forever Episode 3 Discussion
gohdan - May 30, 2011
2 repliesby RafaelDeJongh »»
May 7, 2014 6:49 PM
Poll: Triangle Heart - Sweet Songs Forever Episode 2 Discussion
cyruz - Sep 3, 2008
1 repliesby RafaelDeJongh »»
May 7, 2014 6:30 PM
Poll: Triangle Heart - Sweet Songs Forever Episode 1 Discussion
cyruz - Aug 26, 2008
3 repliesby RafaelDeJongh »»
May 7, 2014 5:50 PM