Synopsis
(English product description provided by the circle)
** Story
One day, me Tetra was walking in a dungeon.
I helped Mart, ex-Demon king by chance.
She took my body, so I was lost, but…
“I will make you Hero. Let’s defeat the present Demon king with me!!”
I was so weak that I dreamed of becoming a hero.
I decided to take the proposition of ex-Demon king to defeat the Demon king.
Me, who can’t fight but can save magic power, and ex-Demon king, who can fight but can’t save magic power.
Will we be able to defeat the Demon king in the end?
** Game
This game is RPG game. Switch two characters and defeat the Demon king(or Hero).
Sex situation changes depending on the character you control.
This game contains multi endings.
Can you able to see the true happy ending?
A strategy flowchart is contained in the product version.
** Sex scene
Illustration: Kesoshiro
Sex situation changes depending on the character you control.
Demon king, who is high pride and lewd, has got “different species sex”, “blowjob” and “t*rture”.
Tetra has got “lost virgin”, “r*pe”, “ecstasy”, “ravaged”, “big cock”, “pregnancy” and “tentacles”.
** Characters
[Tetra]
Main character
Polite and kind to everyone, but very low level adventurer.
[Mart]
Another character. Ex-Demon king.
Trying to revenge the present Demon king.
She has sexual desire and likes sex.
| Circle | Hourglass & Pencil |
| Tags | R18, Role-playing, Music, Application, English |
| Price | 1,430JPY |
Editorial Review
Mart and Tetra occupies a curious niche within adult RPGs: it’s a tactical party game where mechanical decisions directly shape sexual narrative content rather than simply unlocking scenes. This dual-character switching system—where Tetra handles magic conservation while Mart provides combat muscle—echoes resource management games like Darkest Dungeon, but with the adult hook that each character’s perspective reframes the sexual encounters with wildly different power dynamics and scenarios.
The distinctive appeal here lies in that character-locked sex variation. Rather than generic scenes triggered by progression checkpoints, the game promises that controlling Mart versus Tetra produces meaningfully different sexual situations, with the Demon King’s pride and susceptibility to “different species sex” presumably playing out differently depending on whose agency frames the encounter. This is genuinely uncommon in the adult game space, where branching H-content typically stems from dialogue choices or route selection rather than real-time mechanical control. The inclusion of multiple endings and a strategy flowchart (in the product version) signals intentional design depth rather than placeholder content.
The English localization across an R18 game with rhythm and RPG elements also suggests production care above the typical fan-translation basement level, though the synopsis’s fractured English hints at potential rough edges in the narrative itself.
This works best for players seeking mechanical interplay with adult content rather than visual novel devotees expecting linear storytelling. If you prize gameplay systems that genuinely alter sexual scenarios and can tolerate rough localization for the sake of experimental design, Mart and Tetra’s resource-management framework plus character perspective shifts make it worth the time investment.
A modestly ambitious take on adult RPG design that trusts its mechanical conceit over flash.
Official English version available ↓
Get “Mart and Tetra” on DLsite
English Version → Free TrialJapanese Original
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Related Tags:
R18 | English | Application | Music | Role-playing
