Lust Memory

Lust Memory is the final game in the Lust series, though it is chronologically the first. Unlike the other games in the series, it does not have Magrut as a protagonist. The protagonist is instead Chloe, a human woman, making this the only game in the series that is of the yuri genre.

Story
Note: the following is based on information from an untranslated game and is subject to change.

The game begins with exposition about Succubi, like previous games. Then Guide Succubus appears, asks if "you" understands and then says she'll guide "you" to a dream world.

The scene changes to a human city and to the protagonist Chloe. She plans on going home, but sees two girls bullying a third. The bullies leave and the third girl walks into a playground. Worried, Chloe follows her, only to find that the playground is empty. She spots something shining in the centre of the playground and examines it, at which point Guide Succubus appears. The succubus introduces herself as someone who'll guide Chloe to the land of dreams and causes Chloe to faint.

Chloe wakes up in a strange forest. She encounters another succubus, who kisses her and then transforms into the guide. The guide welcomes her, explains how this is a world of succubi, and gives her two options: to fail to return due to the pleasure of this world's succubi, or to return to her world and resume her normal life. She shares her power with Chloe to allow the human to fight against succubi (represented in-game by her giving Chloe 50 levels), tells her to enjoy this world and then leaves. Chloe decides to try to find the exit of this world.

Chloe explores the world, resisting the efforts of various succubi to drain her power. Interspersed throughout these events are brief segments featuring an unknown speaker, who talks about how Chloe will fail and become a succubus.

After defeating her sixth succubus (Hard Succubus), Chloe meets the guide again. She receives a rank based on her (and by extension, the player's) performance in the game: the number of times she was defeated, her current level and the number of levels that were drained. If this rank is not high enough, Chloe is unable to escape the succubus world. She is then returned to the starting forest to try again, this being a New Game Plus.

If the rank is high enough, the guide talks about how Chloe will become a ruthless succubus and asks if she can change this fate. Chloe is transferred to a strange area surrounded by what appears to be outer space. She climbs a staircase, encountering all six of the previous succubi, and these succubi try to tempt her. At the top of the staircase, Chloe meets Lust Reaper, the main villain. Lust Reaper says that it's time for Chloe to become a succubus. Chloe thinks to herself that she wants to wake up from this dream (which she considers a nightmare). Lust Reaper introduces herself and attacks.

If Chloe defeats her, Lust Reaper says that this isn't interesting and the future of this timeline will change. She bids goodbye to Chloe, though mentions that the human would become her right hand succubus in a different timeline. Chloe wakes up in the playground in front of the bullied girl and wonders if she was dreaming. She notices the girl, who suddenly disappears (in the same manner as succubi). Chloe says it's like she's still dreaming and decides to go home. The scene cuts to the guide, who comments on these events, hopes that the player had fun and bids goodbye to them.

If Chloe loses to Lust Reaper twice, she gives in to pleasure. Lust Reaper erases her memories of being human to remove her desire to return to the human world. She decides to make her the eldest of three sisters and to give her a name, but the scene ends before she can say this name. Then the guide appears and explains that this is the backstory of the succubus Manuve, who will eventually encounter a human boy (alluding to Magrut and Lust Grimm). She says that this is the end.